CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Post-Effective Amendment No. 64 to Registration Statement No. 002-57354 on Form N-1A of our report dated August 22, 2018, relating to the financial statements and financial highlights of BlackRock High Yield Municipal Fund, BlackRock National Municipal Fund and BlackRock Short-Term Municipal Fund of BlackRock Municipal Bond Fund, Inc. (the “Funds”), appearing in the Annual Report on Form N-CSR of the Funds for the year ended June 30, 2018, and to the references to us under the headings “Financial Highlights” and “Independent Registered Public Accounting Firm” in the Prospectuses and “Independent Registered Public Accounting Firm” and “Financial Statements” in the Statement of Additional Information, which are part of such Registration Statement.

/s/ Deloitte & Touche LLP

Boston, Massachusetts

October 23, 2018