Abstract: An image forming apparatus may transfer an image to a transfer-receiving material. The image forming apparatus includes a main body to which a cartridge is detachably mounted. The cartridge includes an image bearing member in contact with the transfer-receiving material and a receiving member to receive driving force from the main body to drive and rotate the image bearing member. The image forming apparatus also includes a shaft passing through and supporting the receiving member of the cartridge and a transmission member to rotate around the shaft and to transmit drive force from a motor to the receiving member. A bending unit included with the image forming apparatus bends the shaft passing through and supporting the receiving member and the transmission member.

Abstract: An image forming apparatus includes a housing; a photosensitive member unit detachably mountable relative to the housing and which includes a photosensitive member; a transfer belt unit detachably mountable relative to the housing which includes a transfer belt member and a spacing mechanism for spacing the transfer belt member from the photosensitive member; a shaft member, provided in the housing, for supporting the photosensitive member; a guiding portion, provided on the photosensitive member unit, for guiding mounting, to the housing, of the photosensitive member unit; and a rotation regulating member, provided on the transfer belt unit, for regulating a movement of the guiding portion, in the a rotational direction, of the photosensitive member at the time of the mounting of the photosensitive unit to the housing.