Certification of No Change in Definitive Materials. (497j)

EATON VANCE MUTUAL FUNDS TRUST

Two International Place

Boston, MA 02110

Telephone: [phone]

Telecopy: [phone]

CERTIFICATION

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended, and Regulation S-T, Eaton Vance Mutual Funds Trust (the “Registrant”) (1933 Act File No. 002-90946) certifies (a) that the form of prospectus and statement of additional information dated February 1, 2013 used with respect to the following series of the Registrant, does not differ materially from that which was contained in Post-Effective Amendment No. 196 (“Amendment No. 196”) to the Registrant’s Registration Statement on Form N-1A, and (b) that Amendment No. 196 was filed electronically with the Commission (Accession No. 0000940394-14-000141) on January 28, 2013:

Eaton Vance AMT-Free Municipal Income Fund

Eaton Vance Build America Bond Fund

EATON VANCE MUTUAL FUNDS TRUST

By:

/s/ Maureen A. Gemma

Maureen A. Gemma

Secretary

Date: February 1, 2013

015_0531