In a fixing device including a pressure roller brought into press-contact with a fixing belt, a cylindrical part arranged to cover an outer peripheral surface of an end portion of the fixing belt in a rotation shaft direction, a rotation transfer member formed in an approximately annular shape by allowing two facing end edges of a rectangular sheet material to be brought close to each other, and held between an inner peripheral surface of the cylindrical part and an outer peripheral surface of the fixing belt, a bonding material for bonding the rotation transfer member to the inner peripheral surface of the cylindrical part, and a rotation detection unit that detects rotation of the cylindrical part, the cylindrical part is formed at the inner peripheral surface thereof with a storage recessed portion that stores an end edge of the rotation transfer member, positioned at a downstream side.