    <SEC-DOCUMENT>0001341004-18-000258-index.html : 20180430
    <SEC-HEADER>0001341004-18-000258.hdr.sgml : 20180430
    <ACCEPTANCE-DATETIME>20180430163237
    ACCESSION NUMBER:		0001341004-18-000258
    CONFORMED SUBMISSION TYPE:	497
    PUBLIC DOCUMENT COUNT:		5
    FILED AS OF DATE:		20180430
    DATE AS OF CHANGE:		20180430
    EFFECTIVENESS DATE:		20180430

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			BlackRock Health Sciences Trust
    		CENTRAL INDEX KEY:			0001314966
    		IRS NUMBER:				000000000
    		STATE OF INCORPORATION:			DE

    	FILING VALUES:
    		FORM TYPE:		497
    		SEC ACT:		1933 Act
    		SEC FILE NUMBER:	333-210770
    		FILM NUMBER:		18790324

    	BUSINESS ADDRESS:
    		STREET 1:		100 BELLEVUE PARKWAY
    		CITY:			WILMINGTON
    		STATE:			DE
    		ZIP:			19809
    		BUSINESS PHONE:		(888) 825-2257

    	MAIL ADDRESS:
    		STREET 1:		100 BELLEVUE PARKWAY
    		CITY:			WILMINGTON
    		STATE:			DE
    		ZIP:			19809
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>497
    <SEQUENCE>1
    <FILENAME>form497.htm
    <DESCRIPTION>FORM 497
    <TEXT>
    Document 1 - file: form497.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>image00001.jpg
    <TEXT>
    Document 2 - file: image00001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>image1.jpg
    <TEXT>
    Document 3 - file: image1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>image2.jpg
    <TEXT>
    Document 4 - file: image2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>image3.jpg
    <TEXT>
    Document 5 - file: image3.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>