Image Forming Apparatus Having Cartridge

An image forming apparatus comprising:

• a main body provided with a drive-force supplying part configured to rotate to generate and transmit a drive force;
• a cartridge comprising a rotary body and a drive-force transmission part, the rotary body defining a rotational axis extending in a first direction, the drive-force transmission part being configured to transmit the drive force from the drive-force supplying part to the rotary body;
• and
• a moving member configured to support the cartridge therein and to move in a second direction generally perpendicular to the first direction between an internal position accommodated in the main body and an external position withdrawn from the main body, the cartridge being configured to be attached to and detached from the moving member in the external position, the moving member comprising a drive-force relay part including an input portion and an output portion, the input portion being configured to receive the drive force from the drive-force supplying part of the main body, the output portion being configured to output the drive force from the input portion to the drive-force transmission part of the cartridge attached to the moving member.