A process cartridge is provided for detachably mounting to a main assembly of an electrophotographic image forming apparatus. The process cartridge includes an electrophotographic photosensitive drum, a developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive drum, a drum frame supporting the electrophotographic photosensitive drum, a developing frame supporting the developing roller, the developing roller being movable between a contacting position in which the developing roller is in contact with the electrophotographic photosensitive drum and a spacing position in which the developing roller is spaced from the electrophotographic photosensitive drum, a force receiving member capable of taking an operating position for moving the developing frame from the contacting position to the spacing position, and a stand-by position retracted from the operating position, an urging portion for urging the force receiving member, and an engaging portion for engaging with the force receiving member.