UNITED STATES SECURITIES AND EXCHANGE COMMISSION , 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): October 3, 2013

PS BUSINESS PARKS, INC. (Exact Name of Registrant as Specified in its Charter)

California (State or Other Jurisdiction of Incorporation)

1-10709 95-4300881 (Commission File Number) (I.R.S. Employer Identification Number)

701 Western Avenue, Glendale, 91201-2397 (Address of principal executive offices) (Zip Code)

Registrant's telephone number, including area code: (818) 244-8080

N/A (Former name or former address, if changed since the last report)

Check the appropriate box below if the Form 8-K is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: o Written communication pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o Pre-commencements communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 5.02 Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers

On October 3, 2013, PS Business Parks, Inc. (the “Company”) issued a press release announcing the election by the Board of Directors of the Company of Robert S. Rollo as a member of the Board of Directors of the Company, effective immediately. A copy of the press release is attached as Exhibit 99.1 to this current report on Form 8-K.

Mr. Rollo, 66, served as a Senior Partner of Heidrick & Struggles, a leading international leadership advisory and executive search firm, in Los Angeles from 2006 until his retirement in 2012. Mr. Rollo is a past trustee of the University of Southern California and is Chairman Emeritus of the Southern California Chapter of the National Association of Corporate Directors.

There is no arrangement or understanding pursuant to which Mr. Rollo was nominated or elected as a director, and there have been no transactions, either since the beginning of the Company’s last fiscal year or that are currently proposed, regarding Mr. Rollo that are required to be disclosed pursuant to Item 404(a) of SEC Regulation S-K.

Mr. Rollo will receive compensation for services on the Board of Directors in the form and amounts payable to all outside members of the Board of Directors as described in our 2012 proxy statement.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit 99.1: Press release dated October 3, 2013

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.

PS BUSINESS PARKS, INC.

Date: October 3, 2013

By: /s/ Edward Stokx Edward Stokx Executive Vice President, Chief Financial Officer and Secretary

INDEX TO EXHIBITS

Exhibit No. Description

99.1 PS Business Parks, Inc. Election of New Director Press Release dated October 3, 2013 Exhibit 99.1

News Release

PS Business Parks, Inc. 701 Western Avenue Glendale, CA 91201-2349 www.psbusinessparks.com

For Release: Immediately Date: October 3, 2013 Contact: Edward A. Stokx (818) 244-8080, Ext. 1649

PS Business Parks, Inc. Announces Election of New Director

GLENDALE, California—PS Business Parks, Inc. (NYSE:PSB) announced today that its Board of Directors elected Robert S. Rollo to the Board, effective October 3, 2013.

Mr. Rollo, 66, most recently served as a Senior Partner at Heidrick and Struggles in Los Angeles from 2006 until his retirement in 2012. Heidrick and Struggles is a leading international leadership advisory and executive search firm. Mr. Rollo is a past trustee of the University of Southern California and is Chairman Emeritus of the Southern California Chapter of the National Association of Corporate Directors.

“We are pleased to welcome Bob Rollo to the PS Business Parks’ Board of Directors,” said Joseph D. Russell, Jr., President and Chief Executive Officer of PS Business Parks. “With Bob’s long standing ties in the executive search industry and leadership advisory services he is well known within the Western U.S. business community and brings valuable perspective to our board. I look forward to his expert advice and counsel as a member of our board of directors.”

Company Information

PS Business Parks, Inc., a member of the S&P SmallCap 600, is a self-advised and self-managed real estate investment trust (“REIT”) that acquires, develops, owns and operates commercial properties, primarily multi-tenant flex, office and industrial space. The Company defines “flex” space as buildings that are configured with a combination of office and warehouse space and can be designed to fit a number of uses (including office, assembly, showroom, laboratory, light manufacturing and warehouse space). As of September 30, 2013, the Company wholly owned 28.6 million rentable square feet with approximately 4,750 customers located in eight states, concentrated in California (11.1 million sq. ft.), (4.0 million sq. ft.), (3.9 million sq. ft.), (3.7 million sq. ft.), (2.4 million sq. ft.), Washington (1.5 million sq. ft.), Oregon (1.3 million sq. ft.) and Arizona (0.7 million sq. ft.).

Additional information about PS Business Parks, Inc. is available on the Internet. The Company’s website is www.psbusinessparks.com.

# # #