A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, the process cartridge includes an electrophotographic photosensitive drum (7); a developing roller (10d) for developing an electrostatic latent image formed on the electrophotographic photosensitive drum with a developer;a frame (12) for rotatably supporting the electrophotographic photosensitive drum; a supporting member (32), rotatably journaled in the frame, for rotatably supporting the developing roller at a position away from a center of rotation thereof; an urging member (35) for elastically urging the frame to urge the developing roller toward the electrophotographic photosensitive drum.