0000891092-11-001564.txt : 20110304 0000891092-11-001564.hdr.sgml : 20110304 20110304154155 ACCESSION NUMBER: 0000891092-11-001564 CONFORMED SUBMISSION TYPE: 497 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20110304 DATE AS OF CHANGE: 20110304 EFFECTIVENESS DATE: 20110304 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: 497 SEC ACT: 1933 Act SEC FILE NUMBER: 002-57354 FILM NUMBER: 11664555 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 0000225635 S000002335 BlackRock Short-Term Municipal Fund C000006122 Investor A1 C000006123 Investor B C000006124 Investor C C000006125 Institutional C000038034 Investor A C000038035 BlackRock C000038044 Service 497 1 e41746_497.htm SUPPLEMENT

BlackRock Municipal Bond Fund, Inc.
BlackRock Short-Term Municipal Fund
(the “Fund”)

Supplement to the Statement of Additional Information dated March 4, 2011

The Fund’s Statement of Additional Information is amended as set forth below:

The section entitled “Purchase of Shares—Reduced Initial Sales Charges—Purchase Privileges of Certain Persons—Qualified Plans” in Part II of the Fund’s current Statement of Additional Information is amended as follows with respect to the Fund:

With respect to the Short-Term Municipal Bond Fund of BlackRock Municipal Bond Fund, Inc. the placement fees may be up to the following amounts:

$250,000 and above 0.50%

Shareholders should retain this Supplement for future reference.

Code# SAI-10051-0311-SUP