<SEC-DOCUMENT>0001193125-18-047089-index.html : 20180215
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<ACCEPTANCE-DATETIME>20180215144344
ACCESSION NUMBER:		0001193125-18-047089
CONFORMED SUBMISSION TYPE:	485BPOS
PUBLIC DOCUMENT COUNT:		16
FILED AS OF DATE:		20180215
DATE AS OF CHANGE:		20180215
EFFECTIVENESS DATE:		20180215

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLACKROCK MUNICIPAL BOND FUND, INC.
		CENTRAL INDEX KEY:			0000225635
		IRS NUMBER:				132896246
		STATE OF INCORPORATION:			NJ
		FISCAL YEAR END:			0630

	FILING VALUES:
		FORM TYPE:		485BPOS
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	002-57354
		FILM NUMBER:		18617336

	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:	MERRILL LYNCH MUNICIPAL BOND FUND INC
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ONE LIBERTY MUNICIPAL BOND FUND INC
		DATE OF NAME CHANGE:	19780622

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLACKROCK MUNICIPAL BOND FUND, INC.
		CENTRAL INDEX KEY:			0000225635
		IRS NUMBER:				132896246
		STATE OF INCORPORATION:			NJ
		FISCAL YEAR END:			0630

	FILING VALUES:
		FORM TYPE:		485BPOS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-02688
		FILM NUMBER:		18617337

	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:	MERRILL LYNCH MUNICIPAL BOND FUND INC
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ONE LIBERTY MUNICIPAL BOND FUND INC
		DATE OF NAME CHANGE:	19780622
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<OWNER-CIK>0000225635
<SERIES-ID>S000011867
<SERIES-NAME>BlackRock High Yield Municipal Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000199786
<CLASS-CONTRACT-NAME>Class K
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<DOCUMENT>
<TYPE>485BPOS
<SEQUENCE>1
<FILENAME>d439733d485bpos.htm
<DESCRIPTION>BLACKROCK MUNICIPAL BOND FUND, INC.
<TEXT>
Document 1 - file: d439733d485bpos.htm

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Document 3 - file: bmbfi-20180125.xml

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<FILENAME>bmbfi-20180125.xsd
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Document 4 - file: bmbfi-20180125.xsd

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Document 6 - file: bmbfi-20180125_def.xml

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Document 7 - file: bmbfi-20180125_lab.xml

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<TYPE>EX-101.PRE
<SEQUENCE>8
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Document 8 - file: bmbfi-20180125_pre.xml

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Document 9 - file: R1.htm

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<TYPE>GRAPHIC
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Document 10 - file: BarChart1.png

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Document 11 - file: R2.htm

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Document 12 - file: R7.htm

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Document 13 - file: R8.htm

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<SEQUENCE>14
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Document 14 - file: Show.js

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<SEQUENCE>15
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Document 15 - file: report.css

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<SEQUENCE>17
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Document 17 - file: FilingSummary.html

Document 17 - RAW XML: FilingSummary.xml

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<TYPE>ZIP
<SEQUENCE>19
<FILENAME>0001193125-18-047089-xbrl.zip
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Document 19 - file: 0001193125-18-047089-xbrl.zip

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