To provide a multiple image forming apparatus that is formed by connecting two single image forming apparatuses, in which a first image forming apparatus prints a first surface of a recording material, and a second image forming apparatus prints a second surface of the recording material, the multiple image forming apparatus reducing difference in glossiness level over the fist surface of the recording material, and difference in glossiness between the first surface and the second surface of the recording material.

Temperature of a heating member, a pressuring member, or an external heating member of a fixing device of a second image forming apparatus, which forms an image in the second or later turns, is set lower than temperature of a heating member, pressuring member, or an external heating member of a fixing member of a first image forming apparatus, which forms an image in the initial (the first) turn.