A system of a packing member (46, 146) for packing a cartridge (P, PY, PM, PC, PK) and the cartridge (P, PY, PM, PC, PK) which is detachably mountable to an image forming apparatus and which includes a grip portion (45, 145) for gripping the cartridge (P, PY, PM, PC, PK), in a position deviated from a center line (m) passing through a center of the cartridge (P, PY, PM, PC, PK) with respect to a direction crossing a longitudinal direction of the cartridge (P, PY, PM, PC, PK), said packing member (46, 146) comprising: (i) a frame portion (47, 147) including an opening (47c1, 147c1) as an entrance for the cartridge (P, PY, PM, PC, PK), and a first recessed portion (47c, 147c) for accommodating the cartridge (P, PY, PM, PC, PK), and (ii) a cap portion (48, 148), provided rotatably connected to said frame portion (47, 147) by a hinge portion (49, 149), for openably covering the opening (47c1, 147c1), wherein the first recessed portion (47c, 147c) comprises first limiting portions (47g, 147g), suitable for limiting a position of the cartridge (P, PY, PM, PC, PK) with respect to the direction crossing the longitudinal direction of the cartridge (P, PY, PM, PC, PK) and a direction crossing an entering direction in which the cartridge (P, PY, PM, PC, PK) enters said frame portion (47, 147), the cap portion (48, 148) comprises second limiting portions (48c, 148c) suitable for limiting a position of the cartridge (P, PY, PM, PC, PK) with respect to the entering direction in which the cartridge (P, PY, PM, PC, PK) enters said frame portion (47, 147) in a packing state, and the packing member (46, 146) comprises third limiting portions suitable for limiting a position of the cartridge (P, PY, PM, PC, PK) with respect to the longitudinal direction of the cartridge (P, PY, PM, PC, PK), the packing member (46, 146) does not contact the cartridge (P, PY, PM, PC, PK) at portions other than the limiting portions (47g, 147g, 48c, 148c, 47f), and in that the first limiting portions are suitable for limiting the position of the cartridge (P, PY, PM, PC, PK) so that the cartridge (P, PY, PM, PC, PK) is located in a position where the grip portion (45, 145) is remoter from the hinge portion (49, 149) than the center line (m) of the cartridge (P, PY, PM, PC, PK) with respect to the direction crossing the longitudinal direction of the cartridge (P, PY, PM, PC, PK) and a direction crossing the entering direction in which the cartridge (P, PY, PM, PC, PK) enters said frame portion (47, 147), characterized in that the cartridge (P, PY, PM, PC, PK) includes a photosensitive drum, said limiting portions (47g, 147g, 48c, 148c, 47f) are configured to only contact the cartridge (P, PY, PM, PC, PK) at a position which is not in a region of the cartridge (P, PY, PM, PC, PK) where an electrostatic latent image is to be formed on the photosensitive drum of the cartridge (P, PY, PM, PC, PK). (i) a frame portion (47, 147) including an opening (47c1, 147c1) as an entrance for the cartridge (P, PY, PM, PC, PK), and a first recessed portion (47c, 147c) for accommodating the cartridge (P, PY, PM, PC, PK), and (ii) a cap portion (48, 148), provided rotatably connected to said frame portion (47, 147) by a hinge portion (49, 149), for openably covering the opening (47c1, 147c1),