U.S. SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

                                   FORM 24F-2

                        Annual Notice of Securities Sold
                             Pursuant to Rule 24f-2



1.   Name and address of Issuer:

     Merrill Lynch Municipal Bond Fund, Inc.
     P.O. Box 9011
     Princeton, N.J.  08543-9011

2.   Name of each series or class of securities for which this Form is filed (if
     the Form is being  filed for all series and  classes of  securities  of the
     issuer, check the box but do not list series or classes): [X]

3.   Investment Company Act File Number:                811-02688

     Securities Act File Number:                        333-57634

4.   (a)    Last day of fiscal year for which this Form is filed: June 30, 2006

     (b)    [ ]   Check box if this Form is being filed late (i.e., more
            than 90 calendar days after the end of the issuer's fiscal year).

     (c)    [ ]   Check box if this is the last time the issuer will be filing
            this Form.

5.   Calculation of registration fees:

     (i)    Aggregate sales price of securities sold during
            the fiscal year pursuant to Section 24(f):            $312,336,284

     (ii)   Aggregate price of securities redeemed or
            repurchased during the fiscal year:                   $450,240,675

     (iii)  Aggregate price of securities redeemed or
            repurchased during any prior fiscal year ending
            no earlier than October 31, 1995, that were not
            previously used to reduce registration fees payable
            to the Commission:                                    $3,811,676,772

     (iv)   Total available redemption credits [add Items
            5(ii) and 5(iii)]:                                    $4,261,917,447

     (v)    Net sales - if Item 5(i) is greater than Item
            5(iv) [subtract Item 5(iv) from Item 5(i)]:           $0

     (vi)   Redemption credits available for use in future
            years - if Item 5(i) is less than Item 5(iv):         $3,949,581,163

     (vii)  Multiplier for determining registration fee
            (see instruction C.9):                                .000107

     (viii) Registration fee due [multiply Item 5(v)
            by Item 5(vii) (enter "0" if no fee is due)]:         $0

6.   Prepaid Shares

     If the response to Item 5(i) was determined by deducting an amount of
     securities that were registered under the Securities Act of 1933 pursuant
     to Rule 24e-2 as in effect before October 11, 1997, then report the
     amount of securities (number of shares or other units) deducted here: 0

     If there is a number of shares or other units that were registered
     pursuant to Rule 24e-2 remaining unsold at the end of the fiscal year for
     which this Form is filed that are available for use by the issuer in
     future fiscal years, then state that number here: 0

7.   Interest due - if this Form is being filed more than 90
     days after the end of the issuer's fiscal year (see
     instruction D):                                              $0

8.   Total of the amount of the registration fee due plus any
     interest due [line 5(viii) plus line 7]:                     $0

9.   Date the registration fee and any interest payment was sent to the
     Commission's lockbox depository:

     Method of Delivery:

     [ ]  Wire Transfer

     [ ] Mail or other means



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                                  SIGNATURES


This report has been signed below by the following persons on behalf of the
issuer and in the capacities and on the dates indicated:


By:


/s/ Donald C. Burke
- ------------------------------------
Vice President and Treasurer


Date:  September 26, 2006





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