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



                                          FORM 10-K


  (Mark one)

  /X/ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934
      For the fiscal year ended December 31, 2005

      OR



  / / TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934


      Commission File Number:  333-127589-15


        Structured Asset Securities Corporation

     (Exact name of registrant as specified in its charter)


    Delaware                                           74-2440850
   (State or other jurisdiction of                   (I.R.S Employer
   incorporation or organization)                    Identification No.)



   745 Seventh Avenue, 7th Floor
   New York, NY                               10019
  (Address of principal executive offices)    (Zip Code)


  Registrant's telephone number, including area code: (212) 526-7000

         STRUCTURED ASSET SECURITIES CORPORATION
   Mortgage Pass-Through Certificates, Series 2005-WF4
  (Exact name of registrant as specified in its charter)

   Lehman Brothers Holdings Inc.
  (Exact name of sponsor as specified in its charter)


  Securities registered pursuant to Section 12(b) of the Act:

        NONE.


  Securities registered pursuant to Section 12(g) of the Act:

        NONE.


  Indicate by check mark if the registrant is a well-known seasoned issuer,
  as defined in Rule 405 of the Securities Act.

        Yes  ___     No  X


  Indicate by check mark if the registrant is not required to file reports
  pursuant to Section 13 or Section 15(d) of the Act.

        Yes  ___     No  X


  Indicate by check mark whether the registrant (1) has filed all reports
  required to be filed by Section 13 or 15(d) of the Securities Exchange
  Act of 1934 during the preceding 12 months (or for such shorter period
  that the registrant was required to file such reports), and (2) has been
  subject to such filing requirements for the past 90 days.

        Yes X       No  ___


  Indicate by check mark if disclosure of delinquent filers pursuant to
  Item 405 of Regulation S-K ( 229.405 of this chapter) is not contained
  herein, and will not be contained, to the best of registrant's knowledge,
  in definitive proxy or information statements incorporated by reference
  in Part III of this Form 10-K or any amendment to this Form 10-K.

        Not applicable.


  Indicate by check mark whether the registrant is a large accelerated filer,
  an accelerated filer, or a non-accelerated filer. See Definition of
  "accelerated filer and large accelerated filer" in Rule 12b-2 of the
  Exchange Act. (Check One):


  Large Accelerated Filer ___  Accelerated Filer ___  Non-Accelerated Filer X


  Indicate by check mark whether the registrant is a shell company (as
  defined in Rule 12b-2 of the Act).

        Yes  ___     No  X


  State the aggregate market value of the voting and non-voting common
  equity held by non-affiliates computed by reference to the price at which
  the common equity was last sold, or the average bid and asked price of
  such common equity, as of the last business day of the registrant's most
  recently completed second fiscal quarter.

        Not applicable.


     Documents Incorporated by Reference

  List hereunder the following documents if incorporated by reference and
  the Part of the Form 10-K (e.g. Part I, Part II, etc.) into which the
  document is incorporated: (1)Any annual report to security holders; (2)
  Any proxy or information statement; and (3)Any prospectus filed pursuant
  to Rule 424(b) or (c) under the Securities Act of 1933. The listed
  documents should be clearly described for identification purposes (e.g.
  annual report to security holders for fiscal year ended December 24, 1980).

        Not applicable.


                                   PART I
  Item 1.  Business.

            Not applicable.


  Item 1A.  Risk Factors.

            Not applicable.


  Item 1B.  Unresolved Staff Comments.

            Not applicable.


  Item 2.  Properties.

            Not applicable.


  Item 3.  Legal Proceedings.

            The registrant knows of no material pending legal proceedings
            involving the trust created under the Trust Agreement (the Trust),
            the Trustee, the Master Servicer or the registrant with respect to
            the Trust other than routine litigation incidental to the duties of
            the respective parties.


  Item 4.  Submission of Matters to a Vote of Security Holders.

            None.

                                PART II

  Item 5.  Market for Registrant's Common Equity, Related Stockholder
           Matters and Issuer Purchases of Equity Securities.

            No established public trading market for the Certificates exists.

            Records provided to the Trust by the DTC and the Trustee
            indicate that as of December 31, 2005, the total number of holders
            of record for the Series of Certificates is 32.


  Item 6.  Selected Financial Data.

            Not applicable.

  Item 7.  Management's Discussion and Analysis of Financial Condition and
           Results of Operation.


            Not applicable.


  Item 7A. Quantitative and Qualitative Disclosures about Market Risk.

            Not applicable.


  Item 8.  Financial Statements and Supplementary Data.

            Not applicable.


  Item 9.  Changes in and Disagreements with Accountants on Accounting and
           Financial Disclosure.

            None.


  Item 9A. Controls and Procedures.
            Not applicable.


  Item 9B. Other Information.

            None.


                                PART III

  Item 10. Directors and Executive Officers of the Registrant.

            Not applicable.


  Item 11. Executive Compensation.

            Not applicable.

  Item 12. Security Ownership of Certain Beneficial Owners and Management
           and Related Stockholder Matters.

            Not applicable.

  Item 13. Certain Relationships and Related Transactions.

            Not applicable.


  Item 14. Principal Accounting Fees and Services.

            Not applicable.


                                PART IV

  Item 15. Exhibits, Financial Statement Schedules.

   (a) Exhibits

     (31.1) Rule 13a-14(a)/15d-14(a) Certification

     (99.1) Annual Independent Accountants' Servicing Reports concerning
            servicing activities.

      <TABLE>

      
         <c>
      a) Wells Fargo Bank, N.A., as Servicer <F1>

      </TABLE>

     (99.2) Report of Management as to Compliance with Minimum Servicing
            Standards.

      <TABLE>

      
        <c>
      a) Wells Fargo Bank, N.A., as Servicer <F1>

      </TABLE>

     (99.3) Annual Statements of Compliance under the Pooling and Servicing
            Agreements.

      <TABLE>

      
         <c>
      a) Aurora Loan Services LLC, as Master Servicer <F1>

      </TABLE>


     (99.4) Aggregate Statement of Principal and Interest Distributions to
            Certificate Holders.


   (b) Not applicable.

   (c) Omitted.


  <F1> Filed herewith.


                                SIGNATURES

  Pursuant to the requirements of Section 13 or 15(d) of the Securities
  Exchange Act of 1934, the registrant has duly caused this report to be
  signed on its behalf by the undersigned, thereunto duly authorized:



    Structured Asset Securities Corporation
    (Registrant)


  Signed: Aurora Loan Services LLC as Master Servicer

  By:     E. Todd Whittemore, Executive Vice President

  By: /s/ E. Todd Whittemore, Executive Vice President

  Dated: March 30, 2006


  Exhibit Index

  Exhibit No.

  Ex-31.1 Rule 13a-14(a)/15d-14(a) Certification

  I, E. Todd Whittemore, certify that:

  1. I have reviewed this annual report on Form 10-K, and all reports on
     Form 8-K containing distribution or servicing reports filed in
     respect of periods included in the year covered by this annual report,
     of Structured Asset Securities Corporation Mortgage Pass-Through
     Certificates, Series 2005-WF4 Trust;

  2. Based on my knowledge, the information in these reports, taken as a
     whole, does not contain any untrue statement of a material fact or
     omit to state a material fact necessary to make the statements made,
     in light of the circumstances under which such statements were made,
     not misleading as of the last day of the period covered by this
     annual report;

  3. Based on my knowledge, the distribution or servicing information
     required to be provided to the Trustee by the Servicer under the
     Pooling and Servicing or similar, agreement, for inclusion in these
     reports is included in these reports;

  4. I am responsible for reviewing the activities performed by the master
     servicer under the pooling and servicing, or similar, agreement, and
     based on upon my knowledge and the annual compliance review required
     under that agreement, and except as disclosed in the reports, the
     master servicer has fulfilled its obligations under that agreement;
     and

  5. The reports disclose all significant deficiencies relating to the
     servicer's compliance with the minimum servicing standards based upon
     the report provided by an independent public accountant, after
     conducting a review in compliance with the Uniform Single Attestation
     Program for Mortgage Bankers or similar procedure, as set forth in
     the pooling and servicing, or similar, agreement, that is included in
     these reports.

     In giving the certifications above, I have reasonably relied on
     information provided to me by the following unaffiliated parties:
     Wells Fargo Bank, N.A. as Servicer and Trustee.

     Date: March 30, 2006

     /s/ E. Todd Whittemore
     Signature

     Executive Vice President
     Title


  EX-99.1 (a)
(logo) KPMG

KPMG LLP
2500 Ruan Center
666 Grand Avenue
Des Moines, IA 50309


Independent Accountants' Report


The Board of Directors
Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A.:


We have examined management's assertion, included in the accompanying Assertion
of Management of Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A.
(the Company), that the Company complied with the minimum servicing standards
set forth in the Mortgage Bankers Association of America's Uniform Single
Attestation Program for Mortgage Bankers (USAP) as of and for the year ended
December 31, 2005. Management is responsible for the Company's compliance with
those minimum servicing standards. Our responsibility is to express an opinion
on management's assertion about the Company's compliance based on our
examination.

Our examination was conducted in accordance with attestation standards
established by the American Institute of Certified Public Accountants and,
accordingly, included examining, on a test basis, evidence about the Company's
compliance with the minimum servicing standards specified above and performing
such other procedures, as we considered necessary in the circumstances. We
believe that our examination provides a reasonable basis for our opinion. Our
examination does not provide a legal determination on the Company's compliance
with the minimum servicing standards.

In our opinion, management's assertion that the Company complied with the
aforementioned minimum servicing standards as of and for the year ended December
31, 2005 is fairly stated, in all material respects.


/s/ KPMG LLP

February 21, 2006


KPMG LLP a U.S. limited liability partnership, is the U.S.
member firm of KPMG International, a Swiss cooperative





  EX-99.2 (a)
(logo) WELLS  HOME
       FARGO  MORTGAGE

1 Home Campus
Des Moines, IA 50328


Assertion of Management of Wells Fargo Home Mortgage, a division of Wells Fargo
Bank, N.A.



As of and for the year ended December 31, 2005, Wells Fargo Home Mortgage, a
division of Wells Fargo Bank, N.A. (the Company) has complied in all material
respects with the minimum servicing standards set forth in the Mortgage Bankers
Association of America's Uniform Single Attestation Program for Mortgage
Bankers.

As of and for this same period, the Company had in effect a fidelity bond along
with an errors and omissions policy in the amounts of $100 million and $20
million, respectively.



/s/ Michael J. Heid                 February 21, 2006
Michael J. Heid, Division President, Capital Markets, Finance, & Administration
Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A.


/s/ Franklin R. Codel               February 21, 2006
Franklin R. Codel, Executive Vice President, Finance and Corporate Real Estate
Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A.


/s/ Mary Coffin                     February 21, 2006
Mary Coffin, Executive Vice President, Servicing & Post Closing
Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A.


/s/ Cara K. Heiden
Cara K. Heiden, division President, Nat'l Consumer & Institutional Lending
Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A.


Wells Fargo Home Mortgage
is a division of Wells Fargo Bank, N.A.





  EX-99.3
(logo) AURORA LOAN SERVICES
A Lehman Brothers Company


Via UPS

February 23, 2006

Carla Shedrick
Corporate Trust Services
Wells Fargo Bank Minnesota, N.A.
9062 Old Anapolis Road
Columbia, MD 21045


RE: SASCO 2005-WF4
    Annual Officer's Certificate as to Compliance

Dear Ms. Shedrick:

The undersigned Officer certifies the following for the period ending on
December 31, 2005:

1. I have reviewed the activities and performance of the Master Servicer during
   the preceding calendar year under the terms of the Trust Agreements and to
   the best of this Officer's knowledge, the Master Servicer has fulfilled all
   of its duties, responsibilities or obligations under the Agreements;

2. Based on said review and to the best of this Officer's knowledge, the Master
   Servicer is not in default of its obligations under the terms of the Trust
   Agreements in any material respect, or, if there is a default in the
   fulfillment of its obligations, a description of each default or failure and
   the nature and status thereof has been reported to this Officer;

3. To the best of this Officer's knowledge, nothing has arose to lead this
   Officer to believe that its Servicer has failed to perform any of its duties,
   responsibilities and obligations under its Servicing Agreement during the
   preceding calendar year;

4. To the best of this Officer's knowledge, the Servicer is not in default of
   its obligations under the terms of its Servicing Agreement in any material
   respect, or, if there is a default in the fulfillment of its obligations, a
   description of each default or failure and the nature and status thereof has
   been reported to this Officer;

5. The Master Servicer has received from its Servicer such Servicer's annual
   certificate of compliance and a copy of such Servicer's annual audit report,
   in each case to the extent required under the applicable Servicing Agreement,
   or, if any such certificate or report has not been received by the Master
   Servicer, the Master Servicer is using its best reasonable efforts to obtain
   such certificate or report.

Certified By:

/s/ R. Peter Karr
R. Peter Karr
Senior Vice President
Master Servicing Division


(logo)
EQUAL HOUSING
LENDER





  Ex-99.4

   Schedule of Year-To-Date Principal and Interest Distributions to
   Certificateholders


   <TABLE>

   Class                              Interest             Principal               Losses             Ending Balance
   
                       <c>                    <c>                  <c>                 <c>
   A1                               616,854.27            794,966.56                 0.00             147,984,033.44
   A2                             3,575,668.56         17,180,570.62                 0.00             873,643,429.38
   A3                             1,581,299.80                  0.00                 0.00             383,139,000.00
   A4                               830,492.95                  0.00                 0.00             194,116,000.00
   B1                               123,607.70                  0.00                 0.00              19,622,000.00
   B2                               241,035.64                  0.00                 0.00              38,263,000.00
   M1                               262,540.41                  0.00                 0.00              60,828,000.00
   M2                               221,640.52                  0.00                 0.00              51,017,000.00
   M3                               145,552.07                  0.00                 0.00              33,358,000.00
   M4                               118,837.08                  0.00                 0.00              26,490,000.00
   M5                               102,081.55                  0.00                 0.00              22,565,000.00
   M6                                98,662.86                  0.00                 0.00              21,584,000.00
   M7                                77,419.60                  0.00                 0.00              14,717,000.00
   M8                                82,284.38                  0.00                 0.00              14,717,000.00
   M9                                92,708.92                  0.00                 0.00              14,717,000.00
   X                              2,337,564.53                  0.00                 0.00              27,469,521.53
   P                                196,844.31                  0.00                 0.00                     100.00
   </TABLE>