A process cartridge (50, 250, 350, 450, 650, 750, 850) comprising: a drum unit (31, 231, 331, 431, 531, 631, 731) having a drum frame and including an electrophotographic photosensitive drum (30, 230, 330, 430, 630, 730, 830); a developing unit (41, 241, 341, 441, 541, 641, 741, 841) having a developing frame and including a developing roller (42, 142, 242, 342, 442, 542, 642, 742) for developing an electrostatic latent image formed on said electrophotographic photosensitive drum, said developing unit being movable relative to said drum unit by supporting said developing frame rotatably with respect to said drum frame about an rotational axis (46b, 146b, 446b, 246b, 346b, 746b) such that said developing roller is movable between a contact position in which said developing roller is contacted to said electrophotographic photosensitive drum and a spaced position in which said developing roller is spaced from said electrophotographic photosensitive drum; and a force receiving device (90, 190, 277, 370, 490, 690, 790, 890) including a first force receiving portion (75, 179, 277a, 370a, 475, 575, 675, 775, 875) for receiving a first force and a second force receiving portion (70, 178, 277b, 370b, 470, 670, 770, 870) movable from a stand-by position to a projected position by movement of said first force receiving portion upon receipt of the first force, said second force receiving portion having an end (70d, 370b2, 770d), wherein when said second force receiving portion is at the projected position, said second receiving portion receives a second force to be capable to rotate said developing frame with respect to said drum frame such that said developing roller is movable from the contact position to the spaced position, wherein said end (70d; 370b2, 770d) of said second force receiving portion is closer to the rotational axis when said second force receiving portion is in the stand-by position than when said second force receiving portion is in the projected position. a drum unit (31, 231, 331, 431, 531, 631, 731) having a drum frame and including an electrophotographic photosensitive drum (30, 230, 330, 430, 630, 730, 830); a developing unit (41, 241, 341, 441, 541, 641, 741, 841) having a developing frame and including a developing roller (42, 142, 242, 342, 442, 542, 642, 742) for developing an electrostatic latent image formed on said electrophotographic photosensitive drum, said developing unit being movable relative to said drum unit by supporting said developing frame rotatably with respect to said drum frame about an rotational axis (46b, 146b, 446b, 246b, 346b, 746b) such that said developing roller is movable between a contact position in which said developing roller is contacted to said electrophotographic photosensitive drum and a spaced position in which said developing roller is spaced from said electrophotographic photosensitive drum; and a force receiving device (90, 190, 277, 370, 490, 690, 790, 890) including a first force receiving portion (75, 179, 277a, 370a, 475, 575, 675, 775, 875) for receiving a first force and a second force receiving portion (70, 178, 277b, 370b, 470, 670, 770, 870) movable from a stand-by position to a projected position by movement of said first force receiving portion upon receipt of the first force, said second force receiving portion having an end (70d, 370b2, 770d), wherein when said second force receiving portion is at the projected position, said second receiving portion receives a second force to be capable to rotate said developing frame with respect to said drum frame such that said developing roller is movable from the contact position to the spaced position, wherein said end (70d; 370b2, 770d) of said second force receiving portion is closer to the rotational axis when said second force receiving portion is in the stand-by position than when said second force receiving portion is in the projected position.