An image forming apparatus including: an endless belt; a steering roller for supporting the endless belt and correcting a deviating motion of the endless belt; and a conveying section for conveying a recording material, wherein the conveying section has a position control mechanism of a recording material, and said mechanism conveys the recording material along a conveyance reference, established at a predetermined position in a width direction of the recording material, said width direction is perpendicular to a conveying direction of the recording material, wherein the steering roller is configured to be supported on a supporting point at a side on which the conveyance reference is established, and to be tilted at a side which is opposite to the side on which the conveyance reference is established, with respect to the width direction of the recording material.