<SEC-DOCUMENT>0001193125-17-332422-index.html : 20171103
<SEC-HEADER>0001193125-17-332422.hdr.sgml : 20171103
<ACCEPTANCE-DATETIME>20171103133503
ACCESSION NUMBER:		0001193125-17-332422
CONFORMED SUBMISSION TYPE:	497K
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20171103
DATE AS OF CHANGE:		20171103
EFFECTIVENESS DATE:		20171103

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:		497K
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	002-57354
		FILM NUMBER:		171175689

	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
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000225635
<SERIES-ID>S000002334
<SERIES-NAME>BlackRock National Municipal Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000006118
<CLASS-CONTRACT-NAME>Investor A
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000006119
<CLASS-CONTRACT-NAME>Investor B
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000006121
<CLASS-CONTRACT-NAME>Institutional
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000038033
<CLASS-CONTRACT-NAME>Investor C
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>497K
<SEQUENCE>1
<FILENAME>d470202d497k.htm
<DESCRIPTION>BLACKROCK NATIONAL MUNICIPAL FUND
<TEXT>
Document 1 - file: d470202d497k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g470202backcover_restyle.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g470202backcover_restyle.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g470202c000006118_dgf.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g470202c000006118_dgf.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g470202frontcover_restyle.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g470202frontcover_restyle.gif

</DOCUMENT>
</SEC-DOCUMENT>