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, 2007

      OR


  / / TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934
      For the transition period from ____________ to ____________



      Commission file number: 333-140804-05

      J.P. Morgan Chase Commercial Mortgage Securities Trust 2007-CIBC20
      (exact name of issuing entity as specified in its charter)

      J.P. Morgan Chase Commercial Mortgage Securities Corp.
      (exact name of the depositor as specified in its charter)

      JPMorgan Chase Bank, National Association
      CIBC Inc.
      (exact name of the sponsors as specified in its charter)



  New York                                54-2200914
  (State or other jurisdiction of         54-2200915
  incorporation or organization of        54-6760577
  issuing entity)                         (I.R.S. Employer
                                          Identification No. of
                                          issuing entity)


   c/o Wells Fargo Bank, N.A.
   9062 Old Annapolis Road
   Columbia, MD                                 21045
  (Address of principal executive               (Zip Code of issuing
  offices of issuing entity)                    entity)


 Issuing Entity telephone number, including area code: (410) 884-2000




  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



  Note - Checking the box above will not relieve any registrant required to
  file reports pursuant to Section 13 or 15(d) of the Exchange Act from their
  obligations under those Sections.


  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 (Section 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, a non-accelerated filer, or a smaller reporting
  company.  See the definitions of "large accelerated filer", "accelerated
  filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act.

   Large accelerated filer ___
   Accelerated filer ___
   Non-accelerated filer X (Do not check if a smaller reporting company)
   Smaller reporting company ___

  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.



  Indicate by check mark whether the registrant has filed all documents and
  reports required to be filed by Section 12, 13 or 15(d) of the Securities
  Exchange Act of 1934 subsequent to the distribution of securities under a
  plan confirmed by a court.

    Not applicable.



  Indicate the number of shares outstanding of each of the registrant's
  classes of common stock, as of the latest practicable date.

    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.

               None.


  Item 2.      Properties.

               Not applicable.


  Item 3.      Legal Proceedings.

               Not applicable.


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

               Not applicable.




                                     PART II

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

               Not applicable.


  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.

               Not applicable.


  Item 9A.     Controls and Procedures.

               Not applicable.


  Item 9A(T).  Controls and Procedures.

               Not applicable.


  Item 9B.     Other Information.

               None.




                                    PART III

  Item 10.     Directors, Executive Officers and Corporate Governance.

               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, and Director
               Independence.

               Not applicable.


  Item 14.     Principal Accounting Fees and Services.

               Not applicable.




  ADDITIONAL DISCLOSURE ITEMS FOR REGULATION AB


Item 1112(b) of Regulation AB, Significant Obligor Financial Information.

The mortgaged property that secures the Centro New-Plan Pool I loan constitutes
a significant obligor within the meaning of 1101(k)(2) of Regulation AB and as
disclosed in the prospectus supplement for the J.P. Morgan Chase Commercial
Mortgage Securities Trust 2007-CIBC20. The Net Operating Income of such
significant obligor for the 2007 Fiscal Year End is $26,942,988.96.



Item 1114(b)(2) of Regulation AB, Significant Enhancement  Provider Financial
Information.

No entity or group of affiliated entities provides any external credit
enhancement or other support for the certificates within this transaction as
described under Item 1114 (a) of Regulation AB.



Item 1115(b) of Regulation AB, Certain Derivatives Instruments (Financial
Information).

JPMorgan Chase Bank, N.A. provides an interest rate derivative instrument for
the trust as disclosed in the 424 Prospectus. No additional disclosure is
necessary because the significance percentage for the interest rate derivative
instrument is less than 10%.



Item 1117 of Regulation AB, Legal Proceedings.

The registrant knows of no material pending legal proceedings involving the
Trust and all parties related to such Trust, other than routine litigation
incidental to the duties of those respective parties.



Item 1119 of Regulation AB, Affiliations and Certain Relationships and Related
Transactions.

The information regarding this Item has been previously filed in a 424(b)(5)
filing dated October 1, 2007.



Item 1122 of Regulation AB, Compliance with Applicable Servicing Criteria.

The reports on assessment of compliance with the servicing criteria for
asset-backed securities and the related attestation reports on such assessments
of compliance, required to be delivered under the pooling and servicing
agreement for this transaction, are attached hereto under Item 15.

None of the reports on assessment of compliance with the applicable servicing
criteria, or the related attestation reports, has identified any material
instances of noncompliance with the servicing criteria in Item 1122 of
Regulation AB, except as described below.

LaSalle Bank National Association's ("LaSalle") Report on Assessment
of Compliance with Servicing Criteria for 2007 (the "2007 Assessment") attached
to this Report on Form 10-K describes in Appendix B the following material
instance of noncompliance related to investor reporting:

1122(d)(3)(i)(A) and (B) - During the Reporting Period, certain
monthly investor or remittance reports were not prepared in accordance with the
terms set forth in the transaction agreements and certain investor reports did
not provide the information calculated in accordance with the terms specified
in the transaction agreements for which certain individual errors may or may
not have been material.

The investor reporting errors identified on LaSalle's 2007 Assessment
as material instances of noncompliance (the "Investor Reporting Errors")
included, for example, revised delinquency, REO, foreclosure, repurchase,
payoff or modified loan counts, category indicators and/or balances. The
conclusion that the Investor Reporting Errors amounted to a material instance
of noncompliance was based primarily on the aggregate number of errors as
opposed to the materiality of any one error.

The Investor Reporting Errors were generally caused by human error
resulting primarily from high volume monthly data processing demands that had
to be addressed within constricted time frames with less than a full complement
of operational staff. Between the fourth quarter of the Reporting Period and
the date of the 2007 Assessment, LaSalle has employed additional operational
staff to accommodate the high volume of monthly investor reporting requirements
and minimize the risk of the Investor Reporting Errors recurring. Other
necessary controls are in place to minimize the risk of such errors.

With respect to the specific pool assets and asset-backed securities
related to the Investor Reporting Errors, the errors did not have, and are not
reasonable likely in the future to have, any material impact or effect on pool
asset performance, servicing of the pool assets and payments or expected
payments on the asset-backed securities.



Item 1123 of Regulation AB, Servicer Compliance Statement.

The servicer compliance statements, required to be delivered under the pooling
and servicing agreement for this transaction, are attached hereto under Item 15.



                               Part IV

  Item 15. Exhibits, Financial Statement Schedules.

  (a) Exhibits.

  (4) Pooling and Servicing Agreement (Filed as an exhibit to Form 8-K filed
  on October 16, 2007 and incorporated by reference herein).

  (10.1) Mortgage Loan Purchase Agreement, dated as of September 28, 2007,
  between JPMorgan Chase Bank, N.A. and J.P. Morgan Chase Commercial Mortgage
  Securities Corp., relating to the mortgage loans sold to the depositor by
  JPMorgan Chase Bank, N.A. (Filed as Exhibit 10.1 to Form 8-K filed on
  October 16, 2007 and incorporated by reference herein).

  (10.2) Mortgage Loan Purchase Agreement, dated as of September 28, 2007,
  between CIBC Inc. and J.P. Morgan Chase Commercial Mortgage Securities Corp.,
  relating to the mortgage loans sold to the depositor by CIBC Inc. (Filed as
  Exhibit 10.2 to Form 8-K filed on October 16, 2007 and incorporated by
  reference herein).

  (10.3) ISDA Master Agreement, dated as of September 28, 2007, between
  JPMorgan Chase Bank, N.A. and J.P. Morgan Chase Commercial Mortgage
  Securities Trust 2007-CIBC20 (included as Exhibit GG to Exhibit 4) (Filed as
  Exhibit 10.3 to Form 8-K filed on October 16, 2007 and incorporated by
  reference herein).

  (10.4) Schedule to the ISDA Master Agreement, dated as of September 28, 2007,
  between JPMorgan Chase Bank, N.A. and J.P. Morgan Chase Commercial Mortgage
  Securities Trust 2007-CIBC20 (included as Exhibit GG to Exhibit 4) (Filed as
  Exhibit 10.4 to Form 8-K filed on October 16, 2007 and incorporated by
  reference herein).

  (10.5) Confirmation for U.S. Dollar Interest Rate Swap Transaction under
  1992 Master Agreement, dated September 28, 2007, between JPMorgan Chase Bank,
  N.A. and J.P. Morgan Chase Commercial Mortgage Securities Trust 2007-CIBC20
  (included as Exhibit GG to Exhibit 4) (Filed as Exhibit 10.5 to Form 8-K
  filed on October 16, 2007 and incorporated by reference herein).

  (31) Rule 13a-14(d)/15d-14(d) Certification.

  (33) Reports on assessment of compliance with servicing criteria for
  asset-backed securities.


    <TABLE>
    
      <c>

    33.1 Centerline Servicing Inc. as Special Servicer
    33.2 J.E. Robert Company, Inc. as Special Servicer for the Sawgrass Mills loan
    33.3 KeyCorp Real Estate Capital Markets, Inc. as Master Servicer for The USFS
    Industrial Distribution Portfolio loan
    33.4 LaSalle Bank, National Association as Custodian for the Sawgrass Mills Loan
    33.5 LaSalle Bank, National Association as Trustee for the Sawgrass Mills loan
    33.6 LNR Partners, Inc. as Special Servicer for The USFS Industrial Distribution
    Portfolio loan
    33.7 Midland Loan Services, Inc. as Master Servicer
    33.8 Wells Fargo Bank, N.A. as Trustee
    33.9 Wells Fargo Bank, N.A. as Paying Agent
    33.10 Wells Fargo Bank, N.A. as Custodian
    33.11 Wells Fargo Bank, N.A. as Certificate Administrator and Trustee for The USFS
    Industrial Distribution Portfolio loan
    33.12 Wells Fargo Bank, N.A. as Custodian for The USFS Industrial Distribution Portfolio
    loan
    33.13 Wells Fargo Bank, N.A. as Master Servicer for the Sawgrass Mills loan

    </TABLE>


  (34) Attestation reports on assessment of compliance with servicing criteria
  for asset-backed securities.


    <TABLE>
    
      <c>

    34.1 Centerline Servicing Inc. as Special Servicer
    34.2 J.E. Robert Company, Inc. as Special Servicer for the Sawgrass Mills loan
    34.3 KeyCorp Real Estate Capital Markets, Inc. as Master Servicer for The USFS
    Industrial Distribution Portfolio loan
    34.4 LaSalle Bank, National Association as Custodian for the Sawgrass Mills Loan
    34.5 LaSalle Bank, National Association as Trustee for the Sawgrass Mills loan
    34.6 LNR Partners, Inc. as Special Servicer for The USFS Industrial Distribution
    Portfolio loan
    34.7 Midland Loan Services, Inc. as Master Servicer
    34.8 Wells Fargo Bank, N.A. as Trustee
    34.9 Wells Fargo Bank, N.A. as Paying Agent
    34.10 Wells Fargo Bank, N.A. as Custodian
    34.11 Wells Fargo Bank, N.A. as Certificate Administrator and Trustee for The USFS
    Industrial Distribution Portfolio loan
    34.12 Wells Fargo Bank, N.A. as Custodian for The USFS Industrial Distribution
    Portfolio loan
    34.13 Wells Fargo Bank, N.A. as Master Servicer for the Sawgrass Mills loan

    </TABLE>


   (35) Servicer compliance statement.


    <TABLE>
    
       <c>

    35.1 Centerline Servicing Inc. as Special Servicer
    35.2 J.E. Robert Company, Inc. as Special Servicer for the Sawgrass Mills loan
    35.3 KeyCorp Real Estate Capital Markets, Inc. as Master Servicer for The USFS
    Industrial Distribution Portfolio loan
    35.4 LaSalle Bank, National Association as Trustee for the Sawgrass Mills loan
    35.5 LNR Partners, Inc. as Special Servicer for The USFS Industrial Distribution
    Portfolio loan
    35.6 Midland Loan Services, Inc. as Master Servicer
    35.7 Wells Fargo Bank, N.A. as Trustee
    35.8 Wells Fargo Bank, N.A. as Paying Agent
    35.9 Wells Fargo Bank, N.A. as Certificate Administrator and Trustee for The USFS
    Industrial Distribution Portfolio loan
    35.10 Wells Fargo Bank, N.A. as Master Servicer for the Sawgrass Mills loan

    </TABLE>


   (b) See (a) above.

   (c) Not applicable.



                          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.


   J.P. Morgan Chase Commercial Mortgage Securities Corp.
   (Depositor)


   /s/ Brian Baker
   Brian Baker, President and Chief Executive Officer
   (senior officer in charge of securitization of the depositor)


    Date:   March 27, 2008



  Exhibit Index

  Exhibit No.


   (4) Pooling and Servicing Agreement (Filed as an exhibit to Form 8-K filed
   on October 16, 2007 and incorporated by reference herein).

   (10.1) Mortgage Loan Purchase Agreement, dated as of September 28, 2007,
   between JPMorgan Chase Bank, N.A. and J.P. Morgan Chase Commercial Mortgage
   Securities Corp., relating to the mortgage loans sold to the depositor by
   JPMorgan Chase Bank, N.A. (Filed as Exhibit 10.1 to Form 8-K filed on
   October 16, 2007 and incorporated by reference herein).

   (10.2) Mortgage Loan Purchase Agreement, dated as of September 28, 2007,
   between CIBC Inc. and J.P. Morgan Chase Commercial Mortgage Securities Corp.,
   relating to the mortgage loans sold to the depositor by CIBC Inc. (Filed
   as Exhibit 10.2 to Form 8-K filed on October 16, 2007 and incorporated by
   reference herein).

   (10.3) ISDA Master Agreement, dated as of September 28, 2007, between
   JPMorgan Chase Bank, N.A. and J.P. Morgan Chase Commercial Mortgage
   Securities Trust 2007-CIBC20 (included as Exhibit GG to Exhibit 4) (Filed
   as Exhibit 10.3 to Form 8-K filed on October 16, 2007 and incorporated by
   reference herein).

   (10.4) Schedule to the ISDA Master Agreement, dated as of September 28,
   2007, between JPMorgan Chase Bank, N.A. and J.P. Morgan Chase Commercial
   Mortgage Securities Trust 2007-CIBC20 (included as Exhibit GG to Exhibit 4)
   (Filed as Exhibit 10.4 to Form 8-K filed on October 16, 2007 and
   incorporated by reference herein).

   (10.5) Confirmation for U.S. Dollar Interest Rate Swap Transaction under
   1992 Master Agreement, dated September 28, 2007, between JPMorgan Chase
   Bank, N.A. and J.P. Morgan Chase Commercial Mortgage Securities Trust
   2007-CIBC20 (included as Exhibit GG to Exhibit 4) (Filed as Exhibit 10.5 to
   Form 8-K filed on October 16, 2007 and incorporated by reference herein).

   (31) Rule 13a-14(d)/15d-14(d) Certification.

   (33) Reports on assessment of compliance with servicing criteria for
   asset-backed securities.


    <TABLE>

    
      <c>
    33.1 Centerline Servicing Inc. as Special Servicer
    33.2 J.E. Robert Company, Inc. as Special Servicer for the Sawgrass Mills loan
    33.3 KeyCorp Real Estate Capital Markets, Inc. as Master Servicer for The USFS
    Industrial Distribution Portfolio loan
    33.4 LaSalle Bank, National Association as Custodian for the Sawgrass Mills Loan
    33.5 LaSalle Bank, National Association as Trustee for the Sawgrass Mills loan
    33.6 LNR Partners, Inc. as Special Servicer for The USFS Industrial Distribution
    Portfolio loan
    33.7 Midland Loan Services, Inc. as Master Servicer
    33.8 Wells Fargo Bank, N.A. as Trustee
    33.9 Wells Fargo Bank, N.A. as Paying Agent
    33.10 Wells Fargo Bank, N.A. as Custodian
    33.11 Wells Fargo Bank, N.A. as Certificate Administrator and Trustee for The USFS
    Industrial Distribution Portfolio loan
    33.12 Wells Fargo Bank, N.A. as Custodian for The USFS Industrial Distribution Portfolio
    loan
    33.13 Wells Fargo Bank, N.A. as Master Servicer for the Sawgrass Mills loan

    </TABLE>

   (34) Attestation reports on assessment of compliance with servicing
   criteria for asset-backed securities.


    <TABLE>

    
      <c>
    34.1 Centerline Servicing Inc. as Special Servicer
    34.2 J.E. Robert Company, Inc. as Special Servicer for the Sawgrass Mills loan
    34.3 KeyCorp Real Estate Capital Markets, Inc. as Master Servicer for The USFS
    Industrial Distribution Portfolio loan
    34.4 LaSalle Bank, National Association as Custodian for the Sawgrass Mills Loan
    34.5 LaSalle Bank, National Association as Trustee for the Sawgrass Mills loan
    34.6 LNR Partners, Inc. as Special Servicer for The USFS Industrial Distribution
    Portfolio loan
    34.7 Midland Loan Services, Inc. as Master Servicer
    34.8 Wells Fargo Bank, N.A. as Trustee
    34.9 Wells Fargo Bank, N.A. as Paying Agent
    34.10 Wells Fargo Bank, N.A. as Custodian
    34.11 Wells Fargo Bank, N.A. as Certificate Administrator and Trustee for The USFS
    Industrial Distribution Portfolio loan
    34.12 Wells Fargo Bank, N.A. as Custodian for The USFS Industrial Distribution Portfolio
    loan
    34.13 Wells Fargo Bank, N.A. as Master Servicer for the Sawgrass Mills loan

    </TABLE>

   (35) Servicer compliance statement.


    <TABLE>

    
       <c>
    35.1 Centerline Servicing Inc. as Special Servicer
    35.2 J.E. Robert Company, Inc. as Special Servicer for the Sawgrass Mills loan
    35.3 KeyCorp Real Estate Capital Markets, Inc. as Master Servicer for The USFS
    Industrial Distribution Portfolio loan
    35.4 LaSalle Bank, National Association as Trustee for the Sawgrass Mills loan
    35.5 LNR Partners, Inc. as Special Servicer for The USFS Industrial Distribution
    Portfolio loan
    35.6 Midland Loan Services, Inc. as Master Servicer
    35.7 Wells Fargo Bank, N.A. as Trustee
    35.8 Wells Fargo Bank, N.A. as Paying Agent
    35.9 Wells Fargo Bank, N.A. as Certificate Administrator and Trustee for The USFS
    Industrial Distribution Portfolio loan
    35.10 Wells Fargo Bank, N.A. as Master Servicer for the Sawgrass Mills loan

    </TABLE>