Patent ID: 8116656

Claim:
An image forming apparatus comprising: a transfer unit configured to transfer a toner image on an image bearing member onto a recording material, wherein the transfer unit has a belt unit having a belt and a cleaning unit for cleaning the belt, the belt unit and the cleaning unit being integratedly provided, the cleaning unit is movable for the belt unit, the transfer unit is detachable from an apparatus main body, and a position of the cleaning unit for the belt unit before the transfer unit is attached to the apparatus main body is different from a position of the cleaning unit for the belt unit after the transfer unit is attached to the apparatus main body; an opening portion formed in the apparatus main body to attach and remove the transfer unit; and a guiding portion for guiding the transfer unit to attach and remove the transfer unit through the opening portion, wherein the cleaning unit is guided by the guiding portion, thereby changing a position of the cleaning unit for the belt unit.