Patent ID: 8150293

Claim:
An image forming apparatus capable of forming an image on a recording medium, said apparatus comprising: a main body frame; a supporting member that is movable between an inner position in which the supporting member is located at an inner side of said main body frame and an outer position in which the supporting member is located at an outer side of said main body frame, and that has a mounting portion on which a first cartridge and a second cartridge are detachably mounted; and an exposure unit that exposes an image bearing member so as to form a latent image, said exposure unit being located above the first cartridge and the second cartridge when said supporting member is located at said inner position, wherein the first cartridge is mounted on the most downstream side of said mounting portion in a drawing direction in which said supporting member is drawn out from said inner position to said outer position, and the second cartridge is mounted on an upstream side of the first cartridge in said drawing direction, and in a state where the first cartridge and the second cartridge are mounted on said mounting portion, the first cartridge has a protruded portion that protrudes in an orthogonal direction with respect to said drawing direction more than the second cartridge does, and wherein the distance between said exposure unit and the second cartridge is larger than the distance between said exposure unit and the first cartridge.