Patent ID: 8155553

Claim:
A developing apparatus including a developing roller for developing an electrostatic latent image formed on a photosensitive member, wherein said developing apparatus is detachably mountable to a main assembly of an electrophotographic image forming apparatus in an axial direction of said developing roller, said developing apparatus comprising: a drive transmission member, provided at one end of said developing roller, for receiving a driving force from the main assembly and transmitting the driving force to said developing roller; an urging member, provided at other end, for urging said developing roller in the axial direction; an abutting portion, provided adjacent said one end, for being abutted by said shaft of said developing roller by an urging force of said urging member to position said developing roller with respect to the axial direction; and a contact member contactable to a main assembly contact provided in the main assembly when said developing apparatus is mounted to the main assembly, wherein said contact member contacts to a peripheral surface of said shaft of said developing roller adjacent said one end to apply a voltage to said developing roller.