<HTML><HEAD><TITLE>Form 8-K</TITLE>
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<P style="FONT-SIZE: 14.5pt; MARGIN: 0pt; LINE-HEIGHT: 16.5pt"
align=center>UNITED STATES</P>
<P style="FONT-SIZE: 14.5pt; MARGIN: 0pt; LINE-HEIGHT: 16.5pt"
align=center>SECURITIES AND EXCHANGE COMMISSION</P>
<P style="FONT-SIZE: 12pt; MARGIN: 0pt"><BR></P>
<P
style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt; LINE-HEIGHT: 14pt"
align=center>Washington, D.C. &nbsp;20549</P>
<P style="FONT-SIZE: 14.5pt; MARGIN: 0pt; LINE-HEIGHT: 16.5pt" align=center>FORM
8-K</P>
<P style="FONT-SIZE: 12pt; MARGIN: 0pt"><BR></P>
<P
style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt; LINE-HEIGHT: 14pt"
align=center>CURRENT REPORT</P>
<P style="FONT-SIZE: 12pt; MARGIN: 0pt; LINE-HEIGHT: 14pt" align=center>PURSUANT
TO SECTION 13 OR 15(d) OF THE</P>
<P
style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 24pt; LINE-HEIGHT: 14pt"
align=center>SECURITIES EXCHANGE ACT OF 1934</P>
<P style="FONT-SIZE: 12pt; MARGIN: 0pt; LINE-HEIGHT: 14pt" align=center>Date of
Report (Date of earliest event reported)</P>
<P
style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 24pt; LINE-HEIGHT: 14pt"
align=center>25-Oct-04</P><p style="MARGIN-TOP: 0pt; PADDING-LEFT: 36pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt; LINE-HEIGHT: 14pt"
align=center>Structured Asset Securities Corporation<br>
Mortgage Pass-Through Certificates<br>
Series 2004-17XS</P><P style="FONT-SIZE: 12pt; MARGIN: 0pt; LINE-HEIGHT: 14pt"
align=center><U>Structured Asset Securities Corporation</U></P>
<P style="FONT-SIZE: 12pt; MARGIN: 0pt; LINE-HEIGHT: 14pt" align=center>(Exact
Name of Registrant as Specified in its Charter)</P>
<P style="FONT-SIZE: 12pt; MARGIN: 0pt"><BR></P>
<P style="FONT-SIZE: 12pt; MARGIN: 0pt"><BR></P>
<P style="FONT-SIZE: 12pt; MARGIN: 0pt"><BR></P>
<TABLE align=center>
  <TR>
    <TD
    style="PADDING-RIGHT: 7.2pt; PADDING-LEFT: 7.2pt; PADDING-BOTTOM: 0pt; PADDING-TOP: 0pt"
    vAlign=top width=212>
      <P style="FONT-SIZE: 12pt; MARGIN: 0pt; LINE-HEIGHT: 14pt"
      align=center><U>Delaware</U></P></TD>
    <TD
    style="PADDING-RIGHT: 7.2pt; PADDING-LEFT: 7.2pt; PADDING-BOTTOM: 0pt; PADDING-TOP: 0pt"
    vAlign=top width=212>
      <P style="FONT-SIZE: 12pt; MARGIN: 0pt; LINE-HEIGHT: 14pt"
      align=center><U>333-115858-13</U></P></TD>
    <TD
    style="PADDING-RIGHT: 7.2pt; PADDING-LEFT: 7.2pt; PADDING-BOTTOM: 0pt; PADDING-TOP: 0pt"
    vAlign=top width=212>
      <P style="FONT-SIZE: 12pt; MARGIN: 0pt; LINE-HEIGHT: 14pt"
      align=center><U>74-2440850</U></P></TD></TR>
  <TR>
    <TD
    style="PADDING-RIGHT: 7.2pt; PADDING-LEFT: 7.2pt; PADDING-BOTTOM: 0pt; PADDING-TOP: 0pt"
    vAlign=top width=212>
      <P style="FONT-SIZE: 12pt; MARGIN: 0pt; LINE-HEIGHT: 14pt"
      align=center>(State or Other Jurisdiction</P>
      <P style="FONT-SIZE: 12pt; MARGIN: 0pt; LINE-HEIGHT: 14pt" align=center>Of
      Incorporation)</P></TD>
    <TD
    style="PADDING-RIGHT: 7.2pt; PADDING-LEFT: 7.2pt; PADDING-BOTTOM: 0pt; PADDING-TOP: 0pt"
    vAlign=top width=212>
      <P style="FONT-SIZE: 12pt; MARGIN: 0pt; LINE-HEIGHT: 14pt"
      align=center>(Commission</P>
      <P style="FONT-SIZE: 12pt; MARGIN: 0pt; LINE-HEIGHT: 14pt"
      align=center>File Number)</P></TD>
    <TD
    style="PADDING-RIGHT: 7.2pt; PADDING-LEFT: 7.2pt; PADDING-BOTTOM: 0pt; PADDING-TOP: 0pt"
    vAlign=top width=212>
      <P style="FONT-SIZE: 12pt; MARGIN: 0pt; LINE-HEIGHT: 14pt"
      align=center>(I.R.S. Employer</P>
      <P style="FONT-SIZE: 12pt; MARGIN: 0pt; LINE-HEIGHT: 14pt"
      align=center>Identification No.)</P></TD></TR></TABLE>
<P style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt"
align=justify><BR></P>
<P style="FONT-SIZE: 12pt; MARGIN: 0pt"><BR></P>
<TABLE align=center>
  <TR>
    <TD
    style="PADDING-RIGHT: 7.2pt; PADDING-LEFT: 7.2pt; PADDING-BOTTOM: 0pt; PADDING-TOP: 0pt"
    vAlign=top width=235>
      <P style="FONT-SIZE: 12pt; MARGIN: 0pt; LINE-HEIGHT: 14pt"
      align=center>745 Seventh Avenue, 7th Floor</P>
      <P style="FONT-SIZE: 12pt; MARGIN: 0pt; LINE-HEIGHT: 14pt"
      align=center><U>New York, New York</U></P><P style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt; LINE-HEIGHT: 14pt"
      align=center>(Address of Principal<BR>Executive Offices)</P></TD>
    <TD
    style="PADDING-RIGHT: 7.2pt; PADDING-LEFT: 7.2pt; PADDING-BOTTOM: 0pt; PADDING-TOP: 0pt"
    vAlign=top width=190>&nbsp;</TD>
    <TD
    style="PADDING-RIGHT: 7.2pt; PADDING-LEFT: 7.2pt; PADDING-BOTTOM: 0pt; PADDING-TOP: 0pt"
    vAlign=top width=212>
      <P style="FONT-SIZE: 12pt; MARGIN: 0pt" align=center><BR></P>
      <P style="FONT-SIZE: 12pt; MARGIN: 0pt; LINE-HEIGHT: 14pt"
      align=center><U>10019</U></P>
      <P
      style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt; LINE-HEIGHT: 14pt"
      align=center>(Zip Code)</P></TD></TR></TABLE>
<P style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt"
align=justify><BR></P>
<P
style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 14pt"
align=justify>Registrant&#39;s telephone number, including area code: &nbsp;&nbsp;&nbsp;&nbsp;(212) 526-7000</P>
<br>
<P
style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 14pt"
align=justify>Check the appropriate box below if the Form 8-K filing is intended to simultaneously
satisfy the filing obligation of the registrant under any of the following provisions (see General
Instruction A.2. below):</P>
<P
style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 14pt"
align=justify>
[&nbsp;&nbsp;] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</P>
<P
style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 14pt"
align=justify>
[&nbsp;&nbsp;] Soliciting material pursuant to Rule 14a-12(b) under the Exchange Act (17 CFR 240.14a-12(b))</P>
<P
style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 14pt"
align=justify>
[&nbsp;&nbsp;] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</P>
<P
style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 14pt"
align=justify>
[&nbsp;&nbsp;] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</P>
<br>
<P
style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 14pt"
align=justify><U>Item 8.01 &nbsp;Other Events.</U></P>
<P
style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt; MARGIN-LEFT: 60pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 14pt">On &nbsp;25-Oct-04&nbsp;a scheduled distribution was made from the Trust to holders of the Certificates. The Trustee
has caused to be filed with the Commission, the Monthly Report dated &nbsp;25-Oct-04. The Monthly Report is filed pursuant to and in accordance with (1) numerous no-action letters (2)
current Commission policy in the area.</P>
<P
style="MARGIN-TOP: 0pt; MARGIN-LEFT: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 14pt"
align=justify><U>Item
9.01 &nbsp;Financial Statements and Exhibits.</U></P>
<p style="MARGIN-TOP: 0pt; MARGIN-LEFT: 60pt; FONT-SIZE: 12pt">(C) Exhibits</p>
<P
style="MARGIN-TOP: 0pt; PADDING-LEFT: 144pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: -14pt; TEXT-INDENT: -84pt; LINE-HEIGHT: 14pt">Exhibit No. 99.1</P>
<P
style="MARGIN-TOP: 0pt; PADDING-LEFT: 144pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt; LINE-HEIGHT: 14pt">Monthly Distribution Report
dated: &nbsp;25-Oct-04</P>
<P style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 24pt"
align=center><BR></P>
<P
style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 24pt; LINE-HEIGHT: 14pt"
align=center><B>SIGNATURES</B></P>
<P
style="MARGIN-TOP: 0pt; MARGIN-RIGHT: 24pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt; MARGIN-LEFT: 60pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 14pt"
align=left>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.</P>
<P
style="FONT-SIZE: 12pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 12pt; TEXT-INDENT: 216pt; LINE-HEIGHT: 14pt">By: &nbsp;U.S. Bank National Association, as &nbsp;Trustee&nbsp; for:</p>
<P
style="FONT-SIZE: 12pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-INDENT: 216pt; LINE-HEIGHT: 14pt">Structured Asset Securities Corporation</P>
<P
style="FONT-SIZE: 12pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-INDENT: 216pt; LINE-HEIGHT: 14pt">Mortgage Pass-Through Certificates</P>
<P
style="FONT-SIZE: 12pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-INDENT: 216pt; LINE-HEIGHT: 14pt">Series 2004-17XS</P>
<BR>
<BR>


<P
style="MARGIN-TOP: 0pt; PADDING-LEFT: 264pt; FONT-SIZE: 12pt; MARGIN-RIGHT: 0pt; MARGIN-BOTTOM: -14pt; TEXT-INDENT: -48pt; LINE-HEIGHT: 14pt">By:</P>
<P
style="MARGIN-TOP: 0pt; PADDING-LEFT: 264pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 0pt; LINE-HEIGHT: 14pt">/s/&nbsp;Diana Kenneally</p>
<P
style="MARGIN-TOP: 0pt; PADDING-LEFT: 264pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: -14pt; TEXT-INDENT: -48pt; LINE-HEIGHT: 14pt">Name:</P>
<P
style="MARGIN-TOP: 0pt; PADDING-LEFT: 264pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 0pt; LINE-HEIGHT: 14pt">Diana Kenneally</p>
<P
style="MARGIN-TOP: 0pt; PADDING-LEFT: 264pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: -14pt; TEXT-INDENT: -48pt; LINE-HEIGHT: 14pt">Title:</P>
<P
style="MARGIN-TOP: 0pt; PADDING-LEFT: 264pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 0pt; LINE-HEIGHT: 14pt">Assistant Vice President</p>
<P style="FONT-SIZE: 12pt; MARGIN: 0pt"><BR></P>
<P style="FONT-SIZE: 12pt; MARGIN: 0pt"><BR></P>
<P
style="MARGIN-TOP: 0pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt; TEXT-INDENT: 60pt; LINE-HEIGHT: 14pt"
align=justify>Dated: &nbsp;27-Oct-04</P>
<P style="FONT-SIZE: 12pt; MARGIN-TOP: 24pt; MARGIN-BOTTOM: 12pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 14pt"
align=left><U>Index to Exhibits</U></P>
<P
style="MARGIN-TOP: 0pt; PADDING-LEFT: 120pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: -14pt; TEXT-INDENT: -84pt; LINE-HEIGHT: 14pt">Exhibit No. 99.1</P>
<P
style="MARGIN-TOP: 0pt; PADDING-LEFT: 120pt; FONT-SIZE: 12pt; MARGIN-BOTTOM: 12pt; LINE-HEIGHT: 14pt">Monthly Distribution Report
dated: &nbsp;25-Oct-04</P><BR><hr></BODY></HTML>
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{"company-data": {"conformed-name": "Structured Asset Securities Corp Mortgage Pass-Through Certificates, Series 2004-17XS", "cik": "0001301997", "assigned-sic": "6189", "irs-number": "000000000", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "333-115858-13", "film-number": "041098425"}, "business-address": {"street1": "3 WORLD FINANCIAL CENTER", "city": "NEW YORK", "state": "NY", "zip": "10285", "phone": "2125267000"}, "mail-address": {"street1": "3 WORLD FINANCIAL CENTER", "city": "NEW YORK", "state": "NY", "zip": "10285"}}
Form 8-K
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)
25-Oct-04
Structured Asset Securities Corporation
Mortgage Pass-Through Certificates
Series 2004-17XS
Structured Asset Securities Corporation
(Exact
Name of Registrant as Specified in its Charter)
Delaware
333-115858-13
74-2440850
(State or Other Jurisdiction
Of
      Incorporation)
(Commission
File Number)
(I.R.S. Employer
Identification No.)
745 Seventh Avenue, 7th Floor
New York, New York
(Address of Principal
Executive Offices)
10019
(Zip Code)
Registrant's telephone number, including area code:     (212) 526-7000
Check the appropriate box below if the Form 8-K filing is intended to simultaneously
satisfy the filing obligation of the registrant under any of the following provisions (see General
Instruction A.2. below):
[  ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
[  ] Soliciting material pursuant to Rule 14a-12(b) under the Exchange Act (17 CFR 240.14a-12(b))
[  ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
[  ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Item 8.01  Other Events.
On  25-Oct-04 a scheduled distribution was made from the Trust to holders of the Certificates. The Trustee
has caused to be filed with the Commission, the Monthly Report dated  25-Oct-04. The Monthly Report is filed pursuant to and in accordance with (1) numerous no-action letters (2)
current Commission policy in the area.
Item
9.01  Financial Statements and Exhibits.
(C) Exhibits
Exhibit No. 99.1
Monthly Distribution Report
dated:  25-Oct-04
SIGNATURES
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.
By:  U.S. Bank National Association, as  Trustee  for:
Structured Asset Securities Corporation
Mortgage Pass-Through Certificates
Series 2004-17XS
By:
/s/ Diana Kenneally
Name:
Diana Kenneally
Title:
Assistant Vice President
Dated:  27-Oct-04
Index to Exhibits
Exhibit No. 99.1
Monthly Distribution Report
dated:  25-Oct-04