Image forming apparatus operable in duplex print mode with heat pipe held in contact with intermediate image transfer body

1. Field of the Invention An image forming apparatus operable in a duplex print mode of the present invention includes a heat pipe contacting an intermediate image transfer belt and formed with fins to be cooled off by a fan. A press roller, a plurality of press rollers or a guide plate contacts the inner surface of the intermediate image transfer belt at a position where it faces the heat pipe, increasing the area over which the belt and heat pipe contact each other. This configuration promotes the efficient transfer of heat from the belt to the heat pipe and thereby solves troubles ascribable to heat.