A position of a contact region formed between a transfer belt and a transfer member in the form of a brush is displaced toward a downstream side in a movement direction of the transfer belt with respect to the position in an initial state, whereby it is difficult to acquire excellent transferability. An image forming apparatus, in which a plurality of conductive fibers contacts an inner circumferential surface of the transfer belt, includes a support device configured to support the transfer member in such a manner that the plurality of conductive fibers is pressed between the support device and the transfer belt. A tilt amount of the conductive fiber, which is generated due to a movement of the transfer belt, is smaller than a length of a region where an image bearing member and the transfer belt contact each other in the movement direction of the transfer belt.