To provide a toothed belt wherein tooth rubber portions have surfaces covered with fiber fabrics and a short fiber bound layer formed by melting and solidifying an olefin short fiber group is arranged on the surfaces of the tooth rubber portions, having reduced friction resistance for a long period to contribute to improving the life of the belt, and to provide a tooth portion reinforcing material to be used for the same.

The toothed belt 1 comprises a back rubber portion 4 in which core wires 3 are embedded, and a plurality of tooth rubber portions 2 arranged on the back rubber portion 4 at predetermined pitches in the longitudinal direction of the belt. A tooth portion reinforcing member 5 is adhered to the side of the tooth rubber portions 2. The tooth portion reinforcing member 5 has a short fiber bound layer 8 formed on one face of a base woven fabric 7 by melting and solidifying the olefin short fiber group and a coat rubber layer 9 deposited and formed on the other face. The short fiber bound layer 8 is located on the outermost faces of the tooth rubber portions 2 while being exposed thereto.

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