Patent ID: 8761633

Claim:
An image forming apparatus comprising: a casing; a plurality of photosensitive members arranged along an arrangement direction; and a plurality of developing cartridges each including a developer carrying member, the developer carrying member being configured to supply developer to a corresponding one of the photosensitive members, wherein each photosensitive member is configured to move between an image formation position where an image is formed on the photosensitive member and a retracted position where the photosensitive member is retracted from the image formation position, wherein, when the photosensitive member is in the image formation position, the photosensitive member is configured to close a path through which a corresponding one of the developing cartridges is attached to and removed from the casing, wherein, when the photosensitive member is in the retracted position, the photosensitive member is configured to open the path, and wherein the photosensitive member is configured to at least one of: move from the image formation position to the retracted position in response to the corresponding one of the developing cartridges being removed from the casing through the path; and move from the retracted position to the image formation position in response to the corresponding one of the developing cartridges being attached to the casing through the path.