Image forming apparatus

An image forming apparatus, comprising:

• a first process unit having a first photoconductive drum rotatable about a first axis extending in a first direction;
• a second process unit having a second photoconductive drum rotatable about a second axis extending in the first direction, the second process unit being aligned with the first process unit in a second direction intersecting the first direction;
• a first toner cartridge mountable on the first process unit, the first toner cartridge including:
• a cartridge housing accommodating toner and having a first opening, the cartridge housing including one end portion and the other end portion spaced apart from the one end portion in a third direction intersecting the first direction and the second direction in a state in which the first toner cartridge is mounted on the first process unit;
• and
• a first shutter movable with respect to the cartridge housing between a first closed position at which the first opening is closed and a first open position at which the first opening is opened, the cartridge housing being rotatable between a first position at which the first shutter is positioned at the first closed position and a second position at which the first shutter is positioned at the first open position in a state in which the first toner cartridge is mounted on the first process unit;
• and
• a second toner cartridge mountable on the second process unit,
• wherein, when the cartridge housing moves from the second position to the first position, the one end portion of the cartridge housing comes close to the second toner cartridge and the other end portion of the cartridge housing goes away from the second toner cartridge.