A cartridge mountable, along a predetermined mounting path, to a main assembly of an electrophotographic image forming apparatus including a photosensitive member on which a latent image is capable of being formed and including a main assembly driving shaft, wherein said cartridge is movable in the main assembly between a developing position at a terminal end of said mounting path and a retracted position retracted from the developing position in a direction different from the mounting path, said cartridge comprising: a developer carrying member capable of developing the latent image while being in contact with the photosensitive member when said cartridge is in the developing position; a coupling member capable of inclining relative to a rotational axis of said developer carrying member, wherein said coupling member is capable of taking a reference attitude in which a drive transmission is possible from the main assembly driving shaft to said developer carrying member when said cartridge is in the developing position, an at-mounting attitude inclined relative to the rotational axis of said developer carrying member to engage with the main assembly driving shaft when said cartridge moves along the mounting path, and an at-spaced attitude inclined relative to the rotational axis of said developer carrying member in a direction different from that in the at-mounting attitude when said cartridge is in the retracted position, wherein the reference attitude, the at-mounting attitude and the at-spaced attitude refer to different inclination attitudes of said coupling member; characterized in that said cartridge further comprises an urging portion (185d, 3185c, 3185d, 4185c, 4185d, 5185d, 6185d, 7185d, 8185e, 9185e, 10185e, 11185d, 1255c) configured to apply an urging force to incline said coupling member relative to the rotational axis of said developer carrying member and to urge said coupling member to the at-spaced attitude, wherein when said cartridge is seen along an axial direction of said developer carrying member, an angle formed between the rotational axis of said coupling member taking the at-spaced attitude and the rotational axis of said coupling member taking the at-mounting attitude is a value in a range of 20° to 150°. a developer carrying member capable of developing the latent image while being in contact with the photosensitive member when said cartridge is in the developing position; a coupling member capable of inclining relative to a rotational axis of said developer carrying member, wherein said coupling member is capable of taking a reference attitude in which a drive transmission is possible from the main assembly driving shaft to said developer carrying member when said cartridge is in the developing position, an at-mounting attitude inclined relative to the rotational axis of said developer carrying member to engage with the main assembly driving shaft when said cartridge moves along the mounting path, and an at-spaced attitude inclined relative to the rotational axis of said developer carrying member in a direction different from that in the at-mounting attitude when said cartridge is in the retracted position, wherein the reference attitude, the at-mounting attitude and the at-spaced attitude refer to different inclination attitudes of said coupling member; characterized in that said cartridge further comprises an urging portion (185d, 3185c, 3185d, 4185c, 4185d, 5185d, 6185d, 7185d, 8185e, 9185e, 10185e, 11185d, 1255c) configured to apply an urging force to incline said coupling member relative to the rotational axis of said developer carrying member and to urge said coupling member to the at-spaced attitude, wherein when said cartridge is seen along an axial direction of said developer carrying member, an angle formed between the rotational axis of said coupling member taking the at-spaced attitude and the rotational axis of said coupling member taking the at-mounting attitude is a value in a range of 20° to 150°.