Patent ID: 7738823

Claim:
An image forming apparatus comprising: an image bearing member; an exposure unit configured to expose the image bearing member to light; a developing unit including a plurality of developing devices, and being configured to support the developing devices rotatably relative to the image bearing member; a movable intermediate transfer belt supported by first and second rotation members; a primary transfer member, the primary transfer member and the image bearing member being configured to form a primary transfer portion with the intermediate transfer belt being interposed therebetween; and a secondary transfer member, the secondary transfer member and the second rotation member being configured to form a secondary transfer portion with the intermediate transfer belt being interposed therebetween, wherein a toner image which is formed on the image bearing member by the developing unit is transferred on the intermediate transfer belt at the primary transfer portion, the toner image on the intermediate transfer belt is conveyed to the first rotation member and then to the secondary transfer portion, and the toner image is transferred on a recording material, and wherein the intermediate transfer belt is arranged substantially horizontally, the primary transfer portion being located on a side of the first rotation member with respect to a center portion between the first rotation member and the second rotation member in a moving direction of the intermediate transfer belt, and the developing unit faces the intermediate transfer belt, and wherein the exposure unit, the developing unit, and the image bearing member are arranged above the intermediate transfer belt and within a width of the intermediate transfer belt in a moving direction of the intermediate transfer belt in relation to a horizontal direction.