Patent ID: 7257349

Claim:
An image forming apparatus comprising: an image bearing member on which an electrostatic image is formed; a developing device which develops the electrostatic image with toner, to form a toner image; toner replenishing device which replenishes a replenishing toner to said developing device; toner container which contains the replenishing toner, said toner container being dismountably mountable onto a first attachment portion provided outside a frame member of a main body of said image forming apparatus; a transfer device which transfers the toner image formed on said image bearing member onto a transfer medium; a cleaning device which collects transfer residual toner on said image bearing member; a transfer residual toner conveyance device which conveys the transfer residual toner collected into said cleaning device; a transfer residual toner container which contains the transfer residual toner conveyed by said transfer residual toner conveyance device, the transfer residual toner container being dismountably attachable with respect to a second attachment portion provided at a same side of said image forming apparatus at which the first attachment portion is provided and outside the frame member; and a drive device which provides a drive force to a cartridge, said drive device being provided outside the frame member and at an opposite side at which the first attachment portion and the second attachment portion are provided, wherein at least said image bearing member, said developing device and said cleaning device are provided in the cartridge which is dismountably mountable onto a third attachment portion provided inside the frame member of the main body of said image forming apparatus.