Process cartridge detachably mountable in image forming apparatus

A process cartridge detachably mountable in an image forming apparatus, the image forming apparatus comprising a tray configured to mount the process cartridge, the tray being movable into and out of a main assembly of the image forming apparatus, the process cartridge comprising:

• a developing unit provided with a developing member;
• a photosensitive unit provided with a photosensitive member;
• a side member disposed at a longitudinal end of the process cartridge, the developing unit and the photosensitive unit being arranged along a front-rear direction and movably connected by the side member;
• a separation force receiving member configured to receive a separation force from the image forming apparatus thereby causing the developing unit to move relative to the photosensitive unit;
• a resetting member configured to elastically deform and apply a force to the photosensitive unit when the developing unit moves relative to the photosensitive unit;
• and
• a positioning member provided on at least one of the side member and the photosensitive unit;
• wherein when the separation force receiving member receives the separation force, as the developing unit moves, the positioning member abuts the tray in the front-rear direction by the force of the resetting member.