An image forming apparatus includes a plurality of image forming portions for forming images on a plurality of image bearing members, a plurality of toner containers, an intermediate transfer belt having a surface on which images are primarily transferred, a plurality of rollers for supporting the belt, a plurality of primary transferring portions for transferring the images to the belt at a plurality of primary transferring positions, a secondary transferring portion for transferring the images on the belt to the transported transfer material at a secondary transferring position, and a pair of fixing members for fixing the secondarily transferred images. The plurality of rollers are disposed such that an imaginary plane being an extension of the surface in an axial direction of the plurality of rollers extends through the plurality of toner containers.