Patent ID: 7844199

Claim:
An image forming apparatus comprising: a plurality of image forming units that form toner images having colors being different from each other; a belt-shaped intermediate transfer body that is arranged on an upper side of the plurality of image forming units in a state that the belt-shaped intermediate transfer body is inclined with respect to a horizontal direction, the toner images formed by the plurality of image forming units being transferred onto the belt-shaped intermediate transfer body; an intermediate transfer body unit that holds the belt-shaped intermediate transfer body to be freely attached to and detached from an apparatus body; and a guide rail member that guides the intermediate transfer body unit to be freely attached to and detached from a lateral side of the apparatus body, and that is set so that a direction, in which the intermediate transfer body unit is guided, is changed in the middle of the guiding, wherein, the belt-shaped intermediate transfer body that is arranged in a state that the belt-shaped intermediate transfer body is inclined with respect to the horizontal direction so that a downstream side portion of the belt-shaped intermediate transfer body in an attaching direction is raised, the guide rail member comprises: a first portion that is arranged in a substantially horizontal direction, or arranged in an inclined direction in which an upstream side portion of the belt-shaped intermediate transfer body in the attaching direction is raised with respect to the horizontal direction; a second portion that is located on a downstream side of the attaching direction of the belt-shaped intermediate transfer body with respect to the first portion, and is inclined so that the downstream side portion of the belt-shaped intermediate transfer body in the attaching direction is raised with respect to the horizontal direction.