    <SEC-DOCUMENT>0001193125-17-332161-index.html : 20171103
    <SEC-HEADER>0001193125-17-332161.hdr.sgml : 20171103
    <ACCEPTANCE-DATETIME>20171103110008
    ACCESSION NUMBER:		0001193125-17-332161
    CONFORMED SUBMISSION TYPE:	N-CSR
    PUBLIC DOCUMENT COUNT:		24
    CONFORMED PERIOD OF REPORT:	20170831
    FILED AS OF DATE:		20171103
    DATE AS OF CHANGE:		20171103
    EFFECTIVENESS DATE:		20171103

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			BLACKROCK MUNIVEST FUND, INC.
    		CENTRAL INDEX KEY:			0000835948
    		IRS NUMBER:				222919170
    		STATE OF INCORPORATION:			MD
    		FISCAL YEAR END:			0831

    	FILING VALUES:
    		FORM TYPE:		N-CSR
    		SEC ACT:		1940 Act
    		SEC FILE NUMBER:	811-05611
    		FILM NUMBER:		171175097

    	BUSINESS ADDRESS:
    		STREET 1:		100 BELLEVUE PARKWAY
    		CITY:			WILMINGTON
    		STATE:			DE
    		ZIP:			19809
    		BUSINESS PHONE:		800-441-7762

    	MAIL ADDRESS:
    		STREET 1:		100 BELLEVUE PARKWAY
    		CITY:			WILMINGTON
    		STATE:			DE
    		ZIP:			19809

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	BLACKROCK MUNIVEST FUND INC
    		DATE OF NAME CHANGE:	20061026

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	MUNIVEST FUND INC
    		DATE OF NAME CHANGE:	19920703

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	MUNIPLUS FUND INC
    		DATE OF NAME CHANGE:	19880913
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>N-CSR
    <SEQUENCE>1
    <FILENAME>d450800dncsr.htm
    <DESCRIPTION>BLACKROCK MUNIVEST FUND, INC.
    <TEXT>
    Document 1 - file: d450800dncsr.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.CERT
    <SEQUENCE>2
    <FILENAME>d450800dex99cert.htm
    <DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 302
    <TEXT>
    Document 2 - file: d450800dex99cert.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.906CERT
    <SEQUENCE>3
    <FILENAME>d450800dex99906cert.htm
    <DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 906
    <TEXT>
    Document 3 - file: d450800dex99906cert.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.PROXY.POL
    <SEQUENCE>4
    <FILENAME>d450800dex99proxypol.htm
    <DESCRIPTION>PROXY VOTING POLICY
    <TEXT>
    Document 4 - file: d450800dex99proxypol.htm

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    <DOCUMENT>
    <TYPE>EX-99.CORP.GOV
    <SEQUENCE>5
    <FILENAME>d450800dex99corpgov.htm
    <DESCRIPTION>GLOBAL CORPORATE GOVERNANCE AND ENGAGEMENT PRINCIPLES
    <TEXT>
    Document 5 - file: d450800dex99corpgov.htm

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    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>g438639g27m20.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g438639g27m20.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 7 - file: g438639g31n91.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 8 - file: g438639g38l19.jpg

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    <SEQUENCE>9
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    <DESCRIPTION>GRAPHIC
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    Document 9 - file: g438639g51e43.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 10 - file: g438639g65b16.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 11 - file: g438639g72f30.jpg

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    <SEQUENCE>12
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: g438639g80a74.jpg

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    <SEQUENCE>13
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    <DESCRIPTION>GRAPHIC
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    Document 13 - file: g438639g84w81.jpg

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    <SEQUENCE>14
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    <DESCRIPTION>GRAPHIC
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    Document 14 - file: g438639g98u13.jpg

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    <SEQUENCE>15
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: g438639leaf.jpg

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    <SEQUENCE>16
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    <DESCRIPTION>GRAPHIC
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    Document 16 - file: g44272755544.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 17 - file: g442727black.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 18 - file: g442727canu.jpg

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    <SEQUENCE>19
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 19 - file: g442727hbb7.jpg

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    <SEQUENCE>20
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 20 - file: g442727head333.jpg

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    <SEQUENCE>21
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    <DESCRIPTION>GRAPHIC
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    Document 21 - file: g442727newblack.jpg

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    <SEQUENCE>22
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    <DESCRIPTION>GRAPHIC
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    Document 22 - file: g442727small.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 23 - file: g449001photo_01mips.jpg

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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 24 - file: g449001sig_01mips.jpg

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