a process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus , includes an electrophotographic photosensitive drum , a developing roller , a drum frame , a movable developing frame taking a position where the roller contacts the drum , and a force receiver having first and second force receivers for receiving first and second external forces . the second force receiver moves relative to the developing frame . the second force receiver takes a stand - by position retracted from an operating position when the first force receiver receives the first external force , and moves from the stand - by to the operating position for moving the developing frame from the contacting position to the spacing position . the distance the second force receiver moves from the stand - by to the operating position is larger than the distance the first force receiver moves by the first external force .