Toothed belt and manufacturing method therefor

A toothed belt comprising:

• a belt main body comprising an array of a cord, a tooth portion formed on the lower side of the array of the cord and arranged at a predetermined interval along a longitudinal direction of the cord, and a back surface portion formed on the upper side of the array of the cord and having the cord buried therein, which are integrally molded with a first thermoplastic elastomer composition;
• and
• a back sheet adhered to the back surface portion side of the belt main body and composed of a second thermoplastic elastomer composition,
• wherein the back sheet has an uneven shape in a surface on the adhesion side, and
• wherein the uneven shape is formed by arranging convex and concave portions along the longitudinal direction of the cord at a predetermined interval, and the predetermined interval of the convex and concave portions is smaller than the predetermined interval of the tooth portion.