| 摘要 |
An image forming apparatus includes a rotatable belt, a detection unit configured to detect, at a detecting position, an object on the belt, a cartridge that is attachable to and detachable from a main body of the apparatus independently of the belt, and an openable and closable member that is openable and closable relative to the body to attach and detach the cartridge to and from the body. When the detection unit is at the detecting position, at least a part of the detection unit is located in a space used for attachment and detachment of the cartridge, and, when the detection unit is at a retracted position, which is outside of a space used for attachment and detachment of the cartridge, at least a part of the detection unit is located in a space that is formed by opening the openable and closable member relative to the body. |
