UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

     ----------------------------------------------------------------------

                                    FORM 8-K

                                 CURRENT REPORT
     Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

                Date of Report (Date of earliest event reported):
                                December 31, 2003

     ----------------------------------------------------------------------


                           KNIGHT TRANSPORTATION, INC.
             (Exact name of registrant as specified in its charter)



          Arizona                   000-24946                 86-0649974
(State or other jurisdiction   (Commission File Number)    (I.R.S. Employer
     of incorporation)                                     Identification No.)




           5601 W. Buckeye Road, Phoenix, Arizona           85043
          (Address of principal executive offices)        (Zip Code)


               Registrant's telephone number, including area code:
                                 (602) 269-2000


                                 Not applicable
          (Former name or former address, if changed since last report)





<PAGE>
Item 1.  Changes in Control of Registrant.

         Not applicable.

Item 2.  Acquisition or Disposition of Assets.

         Not applicable.

Item 3.  Bankruptcy or Receivership.

         Not applicable.

Item 4.  Changes in Registrant's Certifying Accountant.

         Not applicable.

Item 5.  Other Events and Regulation FD Disclosure.

     On Wednesday,  December 31, 2003, Knight  Transportation,  Inc., an Arizona
corporation  (the  "Company"),  issued a press  release  (the  "Press  Release")
announcing  the addition of one executive  officer and new titles for two of its
current senior officers  effective  January 1, 2004. A copy of the Press Release
is attached to this report as Exhibit 99.1.

     The  information  in  this  report  and  the  exhibit  hereto  may  contain
"forward-looking   statements"   that  are  made  pursuant  to  the  safe-harbor
provisions of the Private Securities Litigation Reform Act of 1995 and otherwise
may be  protected.  Such  statements  are made based on the current  beliefs and
expectations  of the Company's  management and are subject to significant  risks
and uncertainties. Actual events or results may differ from those anticipated by
forward-looking statements.  Please refer to the Company's Annual Report on Form
10-K  and  other  filings  with  the  Securities  and  Exchange  Commission  for
information  concerning  risks,  uncertainties and other factors that may affect
future results.

Item 6.  Resignations of Registrant's Directors.

         Not applicable.

Item 7.  Financial Statements and Exhibits.

         (c) Exhibits.

         EXHIBIT
         NUMBER            EXHIBIT TITLE
-----------------------------------------------------------------------------
          99.1        Knight Transportation, Inc. press release announcing
                      addition of one executive officer and new titles for
                      two senior officers

<PAGE>
Item 8.  Change in Fiscal Year.

         Not applicable.

Item 9.  Regulation FD Disclosure.

         Not applicable.

Item 10. Amendments to the Registrant's Code of Ethics, or Waiver of a
         Provision of the Code of Ethics.

         Not applicable.

Item 11. Temporary Suspension of Trading Under Registrant's Employee
         Benefit Plans.

         Not applicable.

Item 12. Results of Operations and Financial Condition.

         Not applicable.



<PAGE>



                                    SIGNATURE

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


                                    KNIGHT TRANSPORTATION, INC.


Date: January 5, 2004                 /s/ Timothy M. Kohl
                                    ------------------------------------------
                                    Timothy M. Kohl
                                    President


<PAGE>


                                  EXHIBIT INDEX

  99.1   Knight Transportation, Inc. press release announcing addition of one
         executive officer and new titles for two senior officers
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{"company-data": {"conformed-name": "KNIGHT TRANSPORTATION INC", "cik": "0000929452", "assigned-sic": "4213", "irs-number": "860649974", "state-of-incorporation": "AZ", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-24946", "film-number": "04506381"}, "business-address": {"street1": "5601 W BUCKEYE RD", "city": "PHOENIX", "state": "AZ", "zip": "85043", "phone": "6022692000"}, "mail-address": {"street1": "5601 W BUCKEYE RD", "city": "PHOENIX", "state": "AZ", "zip": "85043"}}
UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

     ----------------------------------------------------------------------

                                    FORM 8-K

                                 CURRENT REPORT
     Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

                Date of Report (Date of earliest event reported):
                                December 31, 2003

     ----------------------------------------------------------------------

                           KNIGHT TRANSPORTATION, INC.
             (Exact name of registrant as specified in its charter)

          Arizona                   000-24946                 86-0649974
(State or other jurisdiction   (Commission File Number)    (I.R.S. Employer
     of incorporation)                                     Identification No.)

           5601 W. Buckeye Road, Phoenix, Arizona           85043
          (Address of principal executive offices)        (Zip Code)

               Registrant's telephone number, including area code:
                                 (602) 269-2000

                                 Not applicable
          (Former name or former address, if changed since last report)
Item 1.  Changes in Control of Registrant.

         Not applicable.

Item 2.  Acquisition or Disposition of Assets.

         Not applicable.

Item 3.  Bankruptcy or Receivership.

         Not applicable.

Item 4.  Changes in Registrant's Certifying Accountant.

         Not applicable.

Item 5.  Other Events and Regulation FD Disclosure.

     On Wednesday,  December 31, 2003, Knight  Transportation,  Inc., an Arizona
corporation  (the  "Company"),  issued a press  release  (the  "Press  Release")
announcing  the addition of one executive  officer and new titles for two of its
current senior officers  effective  January 1, 2004. A copy of the Press Release
is attached to this report as Exhibit 99.1.

     The  information  in  this  report  and  the  exhibit  hereto  may  contain
"forward-looking   statements"   that  are  made  pursuant  to  the  safe-harbor
provisions of the Private Securities Litigation Reform Act of 1995 and otherwise
may be  protected.  Such  statements  are made based on the current  beliefs and
expectations  of the Company's  management and are subject to significant  risks
and uncertainties. Actual events or results may differ from those anticipated by
forward-looking statements.  Please refer to the Company's Annual Report on Form
10-K  and  other  filings  with  the  Securities  and  Exchange  Commission  for
information  concerning  risks,  uncertainties and other factors that may affect
future results.

Item 6.  Resignations of Registrant's Directors.

         Not applicable.

Item 7.  Financial Statements and Exhibits.

         (c) Exhibits.

         EXHIBIT
         NUMBER            EXHIBIT TITLE
-----------------------------------------------------------------------------
          99.1        Knight Transportation, Inc. press release announcing
                      addition of one executive officer and new titles for
                      two senior officers
Item 8.  Change in Fiscal Year.

         Not applicable.

Item 9.  Regulation FD Disclosure.

         Not applicable.

Item 10. Amendments to the Registrant's Code of Ethics, or Waiver of a
         Provision of the Code of Ethics.

         Not applicable.

Item 11. Temporary Suspension of Trading Under Registrant's Employee
         Benefit Plans.

         Not applicable.

Item 12. Results of Operations and Financial Condition.

         Not applicable.
SIGNATURE

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                                    KNIGHT TRANSPORTATION, INC.

Date: January 5, 2004                 /s/ Timothy M. Kohl
                                    ------------------------------------------
                                    Timothy M. Kohl
                                    President
EXHIBIT INDEX

  99.1   Knight Transportation, Inc. press release announcing addition of one
         executive officer and new titles for two senior officers