    <SEC-DOCUMENT>0001104659-19-019167-index.html : 20190402
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    <ACCEPTANCE-DATETIME>20190402073039
    ACCESSION NUMBER:		0001104659-19-019167
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		19
    CONFORMED PERIOD OF REPORT:	20190402
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20190402
    DATE AS OF CHANGE:		20190402

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			SENIOR HOUSING PROPERTIES TRUST
    		CENTRAL INDEX KEY:			0001075415
    		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
    		IRS NUMBER:				043445278
    		STATE OF INCORPORATION:			MD
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-15319
    		FILM NUMBER:		19722765

    	BUSINESS ADDRESS:
    		STREET 1:		C/O THE RMR GROUP
    		STREET 2:		TWO NEWTON PL., 255 WASH. ST., STE. 300
    		CITY:			NEWTON
    		STATE:			MA
    		ZIP:			02458
    		BUSINESS PHONE:		(617) 796-8350

    	MAIL ADDRESS:
    		STREET 1:		C/O THE RMR GROUP
    		STREET 2:		TWO NEWTON PL., 255 WASH. ST., STE. 300
    		CITY:			NEWTON
    		STATE:			MA
    		ZIP:			02458
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    <FILENAME>a19-7528_38k.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: a19-7528_38k.htm

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    <SEQUENCE>2
    <FILENAME>a19-7528_3ex99d1.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 2 - file: a19-7528_3ex99d1.htm

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    <DOCUMENT>
    <TYPE>EX-99.2
    <SEQUENCE>3
    <FILENAME>a19-7528_3ex99d2.htm
    <DESCRIPTION>EX-99.2
    <TEXT>
    Document 3 - file: a19-7528_3ex99d2.htm

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    <DESCRIPTION>GRAPHIC
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    Document 4 - file: g75283mmi001.jpg

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    Document 5 - file: g75283mmi002.jpg

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    <FILENAME>g75283moi001.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g75283moi001.gif

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    <FILENAME>g75283moi002.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: g75283moi002.gif

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    Document 8 - file: g75283moi003.gif

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    <DESCRIPTION>GRAPHIC
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    Document 9 - file: g75283moi004.gif

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    <DESCRIPTION>GRAPHIC
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    Document 10 - file: g75283moi005.gif

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    <DESCRIPTION>GRAPHIC
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    Document 11 - file: g75283moi006.gif

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    <DESCRIPTION>GRAPHIC
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    Document 12 - file: g75283moi007.gif

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    <SEQUENCE>13
    <FILENAME>g75283moi008.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: g75283moi008.gif

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    <SEQUENCE>14
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    Document 14 - file: g75283moi009.gif

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    Document 15 - file: g75283moi010.gif

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    <SEQUENCE>16
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: g75283moi011.gif

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    <SEQUENCE>17
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    <DESCRIPTION>GRAPHIC
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    Document 17 - file: g75283moi012.gif

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    <SEQUENCE>18
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 18 - file: g75283moi013.gif

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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 19 - file: g75283moi014.gif

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