<PAGE>
      As filed with the Securities and Exchange Commission on June 12, 2002

                                                     REGISTRATION NO. 333-
================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM S-8

             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                                   ----------

                            THE MEN'S WEARHOUSE, INC.
             (Exact name of registrant as specified in its charter)

                   TEXAS                                    74-1790172
      (State or other jurisdiction of                    (I.R.S. Employer
       incorporation or organization)                   Identification No.)

            5803 GLENMONT DRIVE
              HOUSTON, TEXAS                                  77081
 (Address of Principal Executive Offices)                   (Zip Code)

          THE MEN'S WEARHOUSE, INC. 1998 KEY EMPLOYEE STOCK OPTION PLAN
                            (Full title of the plan)

                                   ----------

                                 GARY G. CKODRE
                               5803 GLENMONT DRIVE
                            HOUSTON, TEXAS 77081-1701
                     (Name and address of agent for service)

                                   ----------

                                 (713) 592-7200
          (Telephone number, including area code, of agent for service)

                                   ----------

                                  With Copy to:

                           FULBRIGHT & JAWORSKI L.L.P.
                            1301 MCKINNEY, SUITE 5100
                              HOUSTON, TEXAS 77010
                                 (713) 651-5151
                          ATTENTION: MICHAEL W. CONLON

                                   ----------

                         CALCULATION OF REGISTRATION FEE

<Table>
<Caption>
======================================================================================================================
                                                      PROPOSED           PROPOSED MAXIMUM
  TITLE OF SECURITIES          AMOUNT TO          MAXIMUM OFFERING      AGGREGATE OFFERING           AMOUNT OF
    TO BE REGISTERED         BE REGISTERED       PRICE PER SHARE(2)          PRICE(2)             REGISTRATION FEE
  -------------------        -------------       ------------------     ------------------        ----------------
<S>                        <C>                   <C>                    <C>                      <C>
      Common Stock         600,000 shares(1)           $26.86               $16,116,000               $1,483
     $.01 par value
======================================================================================================================
</Table>

(1)      Represents shares added to the 1998 Key Employee Stock Option Plan (the
         "1998 Plan") by amendment dated March 25, 2000. There are also
         registered hereby such indeterminate number of shares of Common Stock
         as may become issuable by reason of the anti-dilution provisions of the
         1998 Plan.

(2)      Estimated solely for the purpose of calculating the registration fee
         pursuant to Rule 457(h) under the Securities Act of 1933 and based upon
         the average of the high and low sales price of a share of Common Stock
         on the New York Stock Exchange on June 6, 2002.

================================================================================


<PAGE>


                                     PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

         This Registration Statement registers additional securities of the same
class as other securities for which two registration statements on Form S-8
(Registration Nos. 333-72549 and 333-80033)(collectively referred to herein as
the "Earlier Registration Statements") relating to The Men's Wearhouse, Inc.
1998 Key Employee Stock Option Plan (the "1998 Plan") are effective. Pursuant to
Instruction E to Form S-8, the contents of the Earlier Registration Statements
are incorporated herein by reference.

ITEM 8. EXHIBITS

                 4.1    -  The Men's Wearhouse, Inc. 1998 Key Employee Stock
                           Option Plan (incorporated by reference from Exhibit
                           10.18 to the Registrant's Annual Report on Form 10-K
                           for the fiscal year ended January 31, 1998).

                 4.2    -  First Amendment to The Men's Wearhouse, Inc. 1998 Key
                           Employee Stock Option Plan (incorporated by reference
                           from Exhibit 4.1 to the Registrant's Registration
                           Statement on Form S-8 (Registration No. 333-80033)).

                 4.3    -  Second Amendment to The Men's Wearhouse, Inc. 1998
                           Key Employee Stock Option Plan (incorporated by
                           reference from Exhibit 10.22 to the Registrant's
                           Annual Report on Form 10-K for the fiscal year ended
                           January 29, 2000).

                 5.1    -  Opinion of Fulbright & Jaworski L.L.P.

                 23.1   -  Consent of Fulbright & Jaworski L.L.P. (included in
                           Exhibit 5.1).

                 23.2   -  Consent of Deloitte & Touche LLP, independent
                           auditors.

                 24.1   -  Powers of Attorney from certain members of the Board
                           of Directors of the Company (contained on pages II-3
                           and II-4).



                                      II-2
<PAGE>



                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-8 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Houston, State of Texas, on June 10, 2002.

                                      THE MEN'S WEARHOUSE, INC.

                                      By:         /s/ GEORGE ZIMMER
                                          --------------------------------------
                                                     George Zimmer
                                               Chairman of the Board and
                                                Chief Executive Officer


                                POWER OF ATTORNEY

         KNOW ALL MEN BY THESE PRESENTS, that each individual whose signature
appears below constitutes and appoints George Zimmer, Eric J. Lane and Gary G.
Ckodre, or any of them, his true and lawful attorney-in-fact and agent, with
full power of substitution and resubstitution, for him and in his name, place
and stead, in any and all capacities, to sign any and all amendments (including
post-effective amendments) to this Registration Statement, and to file the same
and all exhibits thereto, and all documents in connection therewith, with the
Securities and Exchange Commission, granting said attorney-in-fact and agent,
and any of them, full power and authority to do and perform each and every act
and thing requisite and necessary to be done in and about the premises, as fully
to all intents and purposes as he might or could do in person, hereby ratifying
and confirming all that said attorney-in-fact and agent, or any of them, or his
or their substitute or substitutes, may lawfully do or cause to be done by
virtue hereof.

         Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.

<Table>
<Caption>
                 Signature                                            Title                                   Date
                 ---------                                            -----                                   ----
<S>                                            <C>                                                       <C>
             /s/ GEORGE ZIMMER                 Chairman of the Board, Chief Executive Officer and        June 10, 2002
------------------------------------------                          Director
               George Zimmer

            /s/ DAVID H. EDWAB                       Vice Chairman of the Board and Director             June 10, 2002
------------------------------------------
               David H. Edwab

             /s/ ERIC J. LANE                         President and Chief Operating Officer              June 10, 2002
------------------------------------------
                Eric J. Lane

            /s/ NEILL P. DAVIS                 Executive Vice President, Chief Financial Officer,        June 10, 2002
------------------------------------------          Treasurer and Principal Financial Officer
               Neill P. Davis

            /s/ GARY G. CKODRE                         Senior Vice President and Principal               June 10, 2002
------------------------------------------                     Accounting Officer
               Gary G. Ckodre

            /s/ JAMES E. ZIMMER                       Senior Vice President - Merchandising              June 10, 2002
------------------------------------------                        and Director
              James E. Zimmer

          /s/ ROBERT E. ZIMMER                        Senior Vice President - Real Estate                June 10, 2002
------------------------------------------                        and Director
             Robert E. Zimmer

         /s/ STEPHEN H. GREENSPAN             Senior Vice President- K&G Men's Company and Director      June 10, 2002
------------------------------------------
            Stephen H. Greenspan

</Table>



                                      II-3
<PAGE>




<Table>
<S>                                                                 <C>                                  <C>
          /s/ RICHARD E. GOLDMAN                                    Director                             June 10, 2002
------------------------------------------
             Richard E. Goldman

          /s/ RINALDO S. BRUTOCO                                    Director                             June 10, 2002
------------------------------------------
             Rinaldo S. Brutoco

            /s/ MICHAEL L. RAY                                      Director                             June 10, 2002
------------------------------------------
               Michael L. Ray

           /s/ SHELDON I. STEIN                                     Director                             June 10, 2002
------------------------------------------
              Sheldon I. Stein

            /s/ KATHLEEN MASON                                      Director                             June 10, 2002
------------------------------------------
               Kathleen Mason
</Table>



                                      II-4
<PAGE>



                               INDEX TO EXHIBITS



<Table>
<Caption>
        Exhibit
         Number                                          Description of Exhibits
         ------                                          -----------------------
<S>                  <C>
          4.1        The Men's Wearhouse, Inc. 1998 Key Employee Stock Option Plan (incorporated by reference from
                     Exhibit 10.18 to the Registrant's Annual Report on Form 10-K for the fiscal year ended January
                     31, 1998).

          4.2        First Amendment to The Men's Wearhouse, Inc. 1998 Key Employee Stock Option Plan (incorporated
                     by reference from Exhibit 4.1 to the Registrant's Registration Statement on Form S-8
                     (Registration No. 333-80033)).

          4.3        Second Amendment to The Men's Wearhouse, Inc. 1998 Key Employee Stock Option Plan (incorporated
                     by reference from Exhibit 10.22 to the Registrant's Annual Report on Form 10-K for the fiscal
                     year ended January 29, 2000).

          5.1        Opinion of Fulbright & Jaworski L.L.P.

          23.1       Consent of Fulbright & Jaworski L.L.P. (included in Exhibit 5.1).

          23.2       Consent of Deloitte & Touche LLP, independent auditors.

          24.1       Powers of Attorney from certain members of the Board of Directors of the Company (contained on
                     pages II-3 and II-4).
</Table>
[{"type": "S-8", "sequence": "1", "filename": "h97651sv8.txt", "description": "THE MEN'S WEARHOUSE, INC. - 1998 KEY EMP. STOCK OP", "secsgml_size_bytes": 12816}]
{"company-data": {"conformed-name": "MENS WEARHOUSE INC", "cik": "0000884217", "assigned-sic": "5600", "irs-number": "741790172", "state-of-incorporation": "TX", "fiscal-year-end": "0201"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-90304", "film-number": "02677032"}, "business-address": {"street1": "5803 GLENMONT DR", "city": "HOUSTON", "state": "TX", "zip": "77081", "phone": "7135927200"}, "mail-address": {"street1": "5803 GLENMONT DR", "city": "HOUSTON", "state": "TX", "zip": "77081"}}
As filed with the Securities and Exchange Commission on June 12, 2002

                                                     REGISTRATION NO. 333-
================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM S-8

             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                                   ----------

                            THE MEN'S WEARHOUSE, INC.
             (Exact name of registrant as specified in its charter)

                   TEXAS                                    74-1790172
      (State or other jurisdiction of                    (I.R.S. Employer
       incorporation or organization)                   Identification No.)

            5803 GLENMONT DRIVE
              HOUSTON, TEXAS                                  77081
 (Address of Principal Executive Offices)                   (Zip Code)

          THE MEN'S WEARHOUSE, INC. 1998 KEY EMPLOYEE STOCK OPTION PLAN
                            (Full title of the plan)

                                   ----------

                                 GARY G. CKODRE
                               5803 GLENMONT DRIVE
                            HOUSTON, TEXAS 77081-1701
                     (Name and address of agent for service)

                                   ----------

                                 (713) 592-7200
          (Telephone number, including area code, of agent for service)

                                   ----------

                                  With Copy to:

                           FULBRIGHT & JAWORSKI L.L.P.
                            1301 MCKINNEY, SUITE 5100
                              HOUSTON, TEXAS 77010
                                 (713) 651-5151
                          ATTENTION: MICHAEL W. CONLON

                                   ----------

                         CALCULATION OF REGISTRATION FEE
======================================================================================================================
                                                      PROPOSED           PROPOSED MAXIMUM
  TITLE OF SECURITIES          AMOUNT TO          MAXIMUM OFFERING      AGGREGATE OFFERING           AMOUNT OF
    TO BE REGISTERED         BE REGISTERED       PRICE PER SHARE(2)          PRICE(2)             REGISTRATION FEE
  -------------------        -------------       ------------------     ------------------        ----------------
Common Stock         600,000 shares(1)           $26.86               $16,116,000               $1,483
     $.01 par value
======================================================================================================================
(1)      Represents shares added to the 1998 Key Employee Stock Option Plan (the
         "1998 Plan") by amendment dated March 25, 2000. There are also
         registered hereby such indeterminate number of shares of Common Stock
         as may become issuable by reason of the anti-dilution provisions of the
         1998 Plan.

(2)      Estimated solely for the purpose of calculating the registration fee
         pursuant to Rule 457(h) under the Securities Act of 1933 and based upon
         the average of the high and low sales price of a share of Common Stock
         on the New York Stock Exchange on June 6, 2002.

================================================================================
PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

         This Registration Statement registers additional securities of the same
class as other securities for which two registration statements on Form S-8
(Registration Nos. 333-72549 and 333-80033)(collectively referred to herein as
the "Earlier Registration Statements") relating to The Men's Wearhouse, Inc.
1998 Key Employee Stock Option Plan (the "1998 Plan") are effective. Pursuant to
Instruction E to Form S-8, the contents of the Earlier Registration Statements
are incorporated herein by reference.

ITEM 8. EXHIBITS

                 4.1    -  The Men's Wearhouse, Inc. 1998 Key Employee Stock
                           Option Plan (incorporated by reference from Exhibit
                           10.18 to the Registrant's Annual Report on Form 10-K
                           for the fiscal year ended January 31, 1998).

                 4.2    -  First Amendment to The Men's Wearhouse, Inc. 1998 Key
                           Employee Stock Option Plan (incorporated by reference
                           from Exhibit 4.1 to the Registrant's Registration
                           Statement on Form S-8 (Registration No. 333-80033)).

                 4.3    -  Second Amendment to The Men's Wearhouse, Inc. 1998
                           Key Employee Stock Option Plan (incorporated by
                           reference from Exhibit 10.22 to the Registrant's
                           Annual Report on Form 10-K for the fiscal year ended
                           January 29, 2000).

                 5.1    -  Opinion of Fulbright & Jaworski L.L.P.

                 23.1   -  Consent of Fulbright & Jaworski L.L.P. (included in
                           Exhibit 5.1).

                 23.2   -  Consent of Deloitte & Touche LLP, independent
                           auditors.

                 24.1   -  Powers of Attorney from certain members of the Board
                           of Directors of the Company (contained on pages II-3
                           and II-4).

                                      II-2
SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-8 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Houston, State of Texas, on June 10, 2002.

                                      THE MEN'S WEARHOUSE, INC.

                                      By:         /s/ GEORGE ZIMMER
                                          --------------------------------------
                                                     George Zimmer
                                               Chairman of the Board and
                                                Chief Executive Officer

                                POWER OF ATTORNEY

         KNOW ALL MEN BY THESE PRESENTS, that each individual whose signature
appears below constitutes and appoints George Zimmer, Eric J. Lane and Gary G.
Ckodre, or any of them, his true and lawful attorney-in-fact and agent, with
full power of substitution and resubstitution, for him and in his name, place
and stead, in any and all capacities, to sign any and all amendments (including
post-effective amendments) to this Registration Statement, and to file the same
and all exhibits thereto, and all documents in connection therewith, with the
Securities and Exchange Commission, granting said attorney-in-fact and agent,
and any of them, full power and authority to do and perform each and every act
and thing requisite and necessary to be done in and about the premises, as fully
to all intents and purposes as he might or could do in person, hereby ratifying
and confirming all that said attorney-in-fact and agent, or any of them, or his
or their substitute or substitutes, may lawfully do or cause to be done by
virtue hereof.

         Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.
Signature                                            Title                                   Date
                 ---------                                            -----                                   ----
/s/ GEORGE ZIMMER                 Chairman of the Board, Chief Executive Officer and        June 10, 2002
------------------------------------------                          Director
               George Zimmer

            /s/ DAVID H. EDWAB                       Vice Chairman of the Board and Director             June 10, 2002
------------------------------------------
               David H. Edwab

             /s/ ERIC J. LANE                         President and Chief Operating Officer              June 10, 2002
------------------------------------------
                Eric J. Lane

            /s/ NEILL P. DAVIS                 Executive Vice President, Chief Financial Officer,        June 10, 2002
------------------------------------------          Treasurer and Principal Financial Officer
               Neill P. Davis

            /s/ GARY G. CKODRE                         Senior Vice President and Principal               June 10, 2002
------------------------------------------                     Accounting Officer
               Gary G. Ckodre

            /s/ JAMES E. ZIMMER                       Senior Vice President - Merchandising              June 10, 2002
------------------------------------------                        and Director
              James E. Zimmer

          /s/ ROBERT E. ZIMMER                        Senior Vice President - Real Estate                June 10, 2002
------------------------------------------                        and Director
             Robert E. Zimmer

         /s/ STEPHEN H. GREENSPAN             Senior Vice President- K&G Men's Company and Director      June 10, 2002
------------------------------------------
            Stephen H. Greenspan
II-3
/s/ RICHARD E. GOLDMAN                                    Director                             June 10, 2002
------------------------------------------
             Richard E. Goldman

          /s/ RINALDO S. BRUTOCO                                    Director                             June 10, 2002
------------------------------------------
             Rinaldo S. Brutoco

            /s/ MICHAEL L. RAY                                      Director                             June 10, 2002
------------------------------------------
               Michael L. Ray

           /s/ SHELDON I. STEIN                                     Director                             June 10, 2002
------------------------------------------
              Sheldon I. Stein

            /s/ KATHLEEN MASON                                      Director                             June 10, 2002
------------------------------------------
               Kathleen Mason
II-4
INDEX TO EXHIBITS
Exhibit
         Number                                          Description of Exhibits
         ------                                          -----------------------
4.1        The Men's Wearhouse, Inc. 1998 Key Employee Stock Option Plan (incorporated by reference from
                     Exhibit 10.18 to the Registrant's Annual Report on Form 10-K for the fiscal year ended January
                     31, 1998).

          4.2        First Amendment to The Men's Wearhouse, Inc. 1998 Key Employee Stock Option Plan (incorporated
                     by reference from Exhibit 4.1 to the Registrant's Registration Statement on Form S-8
                     (Registration No. 333-80033)).

          4.3        Second Amendment to The Men's Wearhouse, Inc. 1998 Key Employee Stock Option Plan (incorporated
                     by reference from Exhibit 10.22 to the Registrant's Annual Report on Form 10-K for the fiscal
                     year ended January 29, 2000).

          5.1        Opinion of Fulbright & Jaworski L.L.P.

          23.1       Consent of Fulbright & Jaworski L.L.P. (included in Exhibit 5.1).

          23.2       Consent of Deloitte & Touche LLP, independent auditors.

          24.1       Powers of Attorney from certain members of the Board of Directors of the Company (contained on
                     pages II-3 and II-4).