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): November 9, 2006

SENIOR HOUSING PROPERTIES TRUST

Maryland	001-15319	04-3445278
(State of organization)	(Commission file number)	(I.R.S. Employer Identification Number)

400 Centre Street, Newton, Massachusetts 02458

617-796-8350

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:

o Written communications 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-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

ITEM 2.02. RESULTS OF OPERATIONS AND FINANCIAL CONDITION.

On November 9, 2006, Senior Housing Properties Trust, or the Company, issued a press release setting forth the Company’s results of operations and financial condition for the quarter and nine months ended September 30, 2006 and also provided certain supplemental operating and financial data for the quarter and nine months ended September 30, 2006. Copies of the Company’s press release and supplemental operating and financial data are furnished as Exhibits 99.1 and 99.2 hereto, respectively.

ITEM 9.01. FINANCIAL STATEMENTS AND EXHIBITS.

(d) Exhibits 

The Company hereby furnishes the following exhibits:

99.1 Press Release dated November 9, 2006.

99.2 Third Quarter 2006 Supplemental Operating and Financial Data.

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.

SENIOR HOUSING PROPERTIES TRUST

By: /s/ John R. Hoadley

John R. Hoadley

Treasurer and Chief Financial Officer

Date: November 9, 2006