A cartridge (B) detachably attachable to an apparatus main body (A) of an image forming apparatus, the apparatus main body (A) including a drive member and a movement member configured to move between a first position in which the cartridge (B) is used for an image formation and a second position different from the first position, the movement member having an engaging portion , the apparatus main body (A) including a positioning portion and a supporting portion , the cartridge (B) comprising: a rotating member configured to rotate about a first rotational axis (L5); a coupling configured to engage with a drive member of the apparatus main body (A) to receive a drive force from the apparatus main body (A), and configured to rotate together with the rotating member about a second rotational axis, the coupling being movable between a drive position and a retracted position in which a crossing angle (θb) between the first rotational axis and the second rotational axis is larger than that in the drive position; a portion-to-be-positioned configured to be in contact with the positioning portion of the apparatus main body (A) so as to position the cartridge (B) with respect to the apparatus main body (A) when the movement member is in the first position; a rotation supported portion configured to be in contact with the supporting portion of the apparatus main body (A) so as to regulate a rotation of the cartridge (B) about the portion-to-be-positioned when the movement member is in the first position; and a portion-to-be-engaged configured to be engaged with the engaging portion of the movement member , wherein in response to a movement (C2) of the movement member from the first position to the second position, the cartridge (B) is moved by the portion-to-be-engaged being pushed by the engaging portion of the movement member , thereby the coupling being moved from the drive position to the retracted position. a rotating member configured to rotate about a first rotational axis (L5); a coupling configured to engage with a drive member of the apparatus main body (A) to receive a drive force from the apparatus main body (A), and configured to rotate together with the rotating member about a second rotational axis, the coupling being movable between a drive position and a retracted position in which a crossing angle (θb) between the first rotational axis and the second rotational axis is larger than that in the drive position; a portion-to-be-positioned configured to be in contact with the positioning portion of the apparatus main body (A) so as to position the cartridge (B) with respect to the apparatus main body (A) when the movement member is in the first position; a rotation supported portion configured to be in contact with the supporting portion of the apparatus main body (A) so as to regulate a rotation of the cartridge (B) about the portion-to-be-positioned when the movement member is in the first position; and a portion-to-be-engaged configured to be engaged with the engaging portion of the movement member , wherein in response to a movement (C2) of the movement member from the first position to the second position, the cartridge (B) is moved by the portion-to-be-engaged being pushed by the engaging portion of the movement member , thereby the coupling being moved from the drive position to the retracted position. <EOS>