A power transmission belt having elastomer teeth based on an ethylene alpha-olefin elastomer, provided with an external film, is provided in which the external film is based on a thermoplastic olefin, the thermoplastic of the film being associated with a silicone elastomer that represents at least 20% by weight of the total weight of the film and with a compatibilizing element that ensures, within the film, compatibility between the thermoplastic and the silicone elastomer.

The present invention relates to a raw edge cogged V-belt, including: a cog at least on an inner circumferential surface side; and a compression rubber layer disposed on the inner circumferential surface side, in which the compression rubber layer includes a compression rubber layer main body and an inner surface layer covering an inner circumferential surface of the compression rubber layer main body, and a friction coefficient of a surface of the inner surface layer is higher than a friction coefficient of a surface of the compression rubber layer main body that is not covered with the inner surface layer.