A process cartridge (50, 250, 350, 450, 650, 750, 850) detachably mountable to a main assembly (100, 401) of an electrophotographic image forming apparatus, the main assembly including a movable first force application member (61, 165, 261, 361, 461, 761) and a movable second force application member (60, 164, 263, 360, 460, 760, 860), said process cartridge comprising: an electrophotographic photosensitive drum (30, 230, 330, 430, 630, 730, 830); a developing roller (42, 142, 242, 342, 442, 542, 642, 742) for developing an electrostatic latent image formed on said electrophotographic photosensitive drum (30, 230, 330, 430, 630, 730, 830); a drum unit (31, 231, 331, 431, 531, 631, 731) including said electrophotographic photosensitive drum (30, 230, 330, 430, 630, 730, 830); a developing unit (41, 241, 341, 441, 541, 641, 741, 841) including said developing roller (42, 142, 242, 342, 442, 542, 642, 742) and movable relative to said drum unit (31, 231, 331, 431, 531, 631, 731) between a contact position in which said developing roller (42, 142, 242, 342, 442, 542, 642, 742) is contacted to said electrophotographic photosensitive drum (30, 230, 330, 430, 630, 730, 830) and a spaced position in which said developing roller (42, 142, 242, 342, 442, 542, 642, 742) is spaced from said electrophotographic photosensitive drum (30, 230, 330, 430, 630, 730, 830); and a force receiving device (90, 190, 277, 370, 490, 690, 790, 890) including (i) a first force receiving member (75, 179, 277a, 370a, 475, 575, 675, 775, 875) capable of being moved by receiving a first force from the first force application member (61, 165, 261, 361, 461, 761), and (ii) a second force receiving member (70, 178, 277b, 370b, 470, 670, 770, 870) movable (ii-i) toward a projected position in which the second force receiving member (70, 178, 277b, 370b, 470, 670, 770, 870) is projected outwardly of the developing unit (41, 241, 341, 441, 541, 641, 741, 841) from a non-operating position which is retracted from the projected position, (ii-ii) including a cam surface urged by the first force receiving member to urge the second force receiving member toward the projected position when the first force receiving member receives the first force and (ii-iii) capable of receiving a second force from the second force application member (60, 164, 263, 360, 460, 760, 860) to move the developing unit (41, 241, 341, 441, 541, 641, 741, 841) from the contact position to the spaced position while the first force application member (61, 165, 261, 361, 461, 761) receives the first force and the second force receiving member receives (60, 164, 263, 360, 460, 760, 860) the second force at the projected position. an electrophotographic photosensitive drum (30, 230, 330, 430, 630, 730, 830); a developing roller (42, 142, 242, 342, 442, 542, 642, 742) for developing an electrostatic latent image formed on said electrophotographic photosensitive drum (30, 230, 330, 430, 630, 730, 830); a drum unit (31, 231, 331, 431, 531, 631, 731) including said electrophotographic photosensitive drum (30, 230, 330, 430, 630, 730, 830); a developing unit (41, 241, 341, 441, 541, 641, 741, 841) including said developing roller (42, 142, 242, 342, 442, 542, 642, 742) and movable relative to said drum unit (31, 231, 331, 431, 531, 631, 731) between a contact position in which said developing roller (42, 142, 242, 342, 442, 542, 642, 742) is contacted to said electrophotographic photosensitive drum (30, 230, 330, 430, 630, 730, 830) and a spaced position in which said developing roller (42, 142, 242, 342, 442, 542, 642, 742) is spaced from said electrophotographic photosensitive drum (30, 230, 330, 430, 630, 730, 830); and a force receiving device (90, 190, 277, 370, 490, 690, 790, 890) including (i) a first force receiving member (75, 179, 277a, 370a, 475, 575, 675, 775, 875) capable of being moved by receiving a first force from the first force application member (61, 165, 261, 361, 461, 761), and (ii) a second force receiving member (70, 178, 277b, 370b, 470, 670, 770, 870) movable (ii-i) toward a projected position in which the second force receiving member (70, 178, 277b, 370b, 470, 670, 770, 870) is projected outwardly of the developing unit (41, 241, 341, 441, 541, 641, 741, 841) from a non-operating position which is retracted from the projected position, (ii-ii) including a cam surface urged by the first force receiving member to urge the second force receiving member toward the projected position when the first force receiving member receives the first force and (ii-iii) capable of receiving a second force from the second force application member (60, 164, 263, 360, 460, 760, 860) to move the developing unit (41, 241, 341, 441, 541, 641, 741, 841) from the contact position to the spaced position while the first force application member (61, 165, 261, 361, 461, 761) receives the first force and the second force receiving member receives (60, 164, 263, 360, 460, 760, 860) the second force at the projected position.