Image Forming Apparatus and Photosensitive Unit

A photosensitive unit detachably mountable to an apparatus body of an image forming apparatus along a prescribed direction, comprising:

• a frame;
• a plurality of photosensitive bodies supported by the frame in a state parallelly arranged in the prescribed direction, on which electrostatic latent images are formed;
• a plurality of cartridges including a developer carrier opposed to the corresponding photosensitive body and detachably mountable to the frame;
• and
• a pressing portion provided on the frame for pressing the cartridges to direct the developer carrier toward the corresponding photosensitive body, wherein
• each cartridge can shift in the frame to a first attitude pressed by the pressing portion and a second attitude released from the press of the pressing portion and detachable from the frame, and includes an abutted portion abutted by the apparatus body when the photosensitive unit is mounted to the apparatus body while the cartridge is in the second attitude, and
• the cartridge in the second attitude is abutted by the apparatus body on the abutted portion thereby shifting from the second attitude to the first attitude when the photosensitive unit is mounted to the apparatus body.