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Senior Housing Properties Trust Announces Proposed Public Offering of 10,000,000 Common Shares

The joint book-running managers for this offering are Jefferies & Company, Inc., BofA Merrill Lynch and Morgan Stanley. The co-lead managers for this offering are Citi, Morgan Keegan, RBC Capital Markets, UBS Investment Bank and Wells Fargo Securities. The co-managers for this offering are BB&T Capital Markets, Janney Montgomery Scott LLC and Oppenheimer & Co.

This press release is neither an offer to sell nor a solicitation of an offer to buy shares, nor shall there be any sale of these securities in any state or jurisdiction in which the offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of such state or jurisdiction. The preliminary prospectus supplement relating to this offering and related prospectus are expected to be filed with the SEC and copies can be obtained by contacting the offices of, Equity Syndicate Prospectus Department, Jefferies & Company, Inc., 520 Madison Avenue, 12th Floor, New York, NY, 10022 at (877) 547-6340 and at Prospectus_Department@Jefferies.com; BofA Merrill Lynch, 4 World Financial Center, New York, NY 10080, Attn: Prospectus Department at dg.prospectus_requests@baml.com; and Morgan Stanley & Co. Incorporated, 180 Varick St., 2^nd Floor, New York, NY, at (866) 718-1649 Attention: Prospectus Department or by email at prospectus@morganstanley.com.

WARNING REGARDING FORWARD LOOKING STATEMENTS

THIS PRESS RELEASE CONTAINS FORWARD LOOKING STATEMENTS WITHIN THE MEANING OF THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995 AND THE FEDERAL SECURITIES LAWS. THESE FORWARD LOOKING STATEMENTS ARE BASED UPON SNH'S PRESENT BELIEFS AND EXPECTATIONS, BUT THESE STATEMENTS ARE NOT GUARANTEED. FOR EXAMPLE, ALTHOUGH THIS PRESS RELEASE REFERS TO AN OFFERING OF 10,000,000 COMMON SHARES, GREATER OR FEWER THAN 10,000,000 COMMON SHARES MAY BE SOLD OR THIS OFFERING MAY BE WITHDRAWN. INVESTORS SHOULD NOT PLACE UNDUE RELIANCE UPON ANY FORWARD LOOKING STATEMENT.

A Maryland Real Estate Investment Trust with transferable shares of beneficial interest listed on the New York Stock Exchange.
No shareholder, Trustee or officer is personally liable for any act or obligation of the Trust.

Senior Housing Properties Trust
Timothy A. Bonang, 617-796-8234
Vice President, Investor Relations
or
Elisabeth A. Heiss, 617-796-8234
Manager, Investor Relations
www.snhreit.com