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

                                   FORM 11-K/A

                                 Amendment No. 1


[x]      Annual Report Pursuant to Section 15(D) of the Securities Exchange Act
         of 1934

For the fiscal year ended December 31, 2005
                          -----------------

                                       OR

[]       Transition Report Pursuant to Section 15(D) of the Securities Exchange
         Act of 1934

For the transition period from  ____________  to  ____________.

Commission File Number:  1-10709
                         -------

A.   Full title of the plan and the address of the plan, if different from that
     of the issuer named below:

                          PS 401(k) PROFIT SHARING PLAN
                               701 Western Avenue
                             Glendale, CA 91201-2349

B.   Name of issuer of the securities held pursuant to the plan and the address
     of its principal executive office:

                              PS BUSINESS PARKS, INC.
                               701 Western Avenue
                             Glendale, CA 91201-2349










                                EXPLANATORY NOTE

We are filing this  Amendment No. 1 (the  "Amendment")  to our Form 11-K for the
fiscal year ended December 31, 2005 (the "2005 11-K") to correct an error by the
Registrant  with  respect  to the date  provided  on the  Report of  Independent
Registered  Public  Accounting Firm - 2004 signed by Link, Murrel & Company (the
"Report"), which should have been May 25, 2005.

For purposes of this Form 11-K/A, the corrected Report follows and replaces the
Report originally filed in its entirety. No other information contained in the
original filing is amended hereby, and this Amendment does not reflect events
occurring after June 29, 2006, the date of the original filing, or modify or
update any other disclosures in the original 2005 11-K.








             REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


To the Administrative Committee
PS 401(k) Profit Sharing Plan
Glendale, California

We have audited the accompanying statement of net assets available for benefits
of PS 401(k) Profit Sharing Plan (the "Plan") as of December 31, 2004. This
financial statement is the responsibility of the Plan's management. Our
responsibility is to express an opinion on this financial statement based on our
audit.

We conducted our audit in accordance with the standards of the Public Company
Accounting Oversight Board (United States). Those standards require that we plan
and perform the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. An audit also includes, assessing the accounting principles used and
significant estimates made by management, and evaluating the overall financial
statement presentation. We believe that our audit provides a reasonable basis
for our opinion.

In our opinion, the financial statement referred to above presents fairly, in
all material respects, the net assets available for benefits of the Plan at
December 31, 2004, in conformity with U.S. generally accepted accounting
principles.



/s/ Link, Murrel & Co.
----------------------
Irvine, California

May 25, 2005







                                   SIGNATURES



Pursuant to the requirements of the Securities Exchange Act of 1934, the
trustees (or other persons who administer the Plan) have duly caused this annual
report to be signed on its behalf by the undersigned hereunto duly authorized.

                              PS 401(k) PROFIT SHARING PLAN

Date: January 12, 2007

                              By: /s/ Candace Krol
                                  ----------------
                                  Candace Krol
                                  Chairman, Administrative Committee