Patent ID: 8233821

Claim:
A cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, said cartridge comprising: a developer accommodating portion for accommodating a developer; a developing roller for developing an electrostatic latent image formed on an electrophoto graphic photosensitive drum with the developer accommodated in said developer accommodating potion; a cartridge frame extended in a longitudinal direction of said developing roller; a bearing member, provided at one longitundinal end portion of said cartridge frame, for supporting a developing roller shaft portion at one longitudinal end portion of said developing roller; a rotational force receiving member for receiving, from the main assembly, a rotational force for rotating said developing roller, in a state in which said cartridge is mounted to the main assembly; a side cover provided outside said bearing member with respect to a longitudinal direction of said cartridge frame; a first fastening member fastening said bearing member to said cartridge frame to mount said bearing member to said cartridge frame; and a second fastening member fastening said side cover to said cartridge frame to mount said side cover to said cartridge frame, wherein said first fastening member is a first screw, said first screw extends through a hole provided in said side cover and through a through-hole provided in said bearing member to a fastening portion provided in said cartridge frame, and said first screw is fastened to said frame by a tool entering through the hole in said side cover.