An image forming apparatus includes (i) a developing unit including a storage frame including a receiving opening, and a developing shutter movable between a closed position to cover the receiving opening and an open position to expose the receiving opening, (ii) a toner cartridge including a toner frame having a discharge opening and movable between a mounting position at which the discharge opening faces the receiving opening and a retreat position, (iii) a moving device configured to move the toner cartridge from the retreat position toward the mounting position, and (iv) a drive device including a drive source and configured to drive the moving device. The developing shutter moves from the closed position toward the open position by a force of the drive source when the toner cartridge moves from the retreat position toward the mounting position.

An image forming apparatus includes (i) a developing unit including a storage frame having a receiving opening, (ii) a toner cartridge including a toner frame having a discharge opening, and a toner shutter movable between a closed position to cover the discharge opening and an open position to expose the discharge opening, the toner cartridge being movable relative to the storage frame between a mounting position at which the discharge opening faces the receiving opening and a retreat position at which the toner cartridge is moved from the mounting position, and (iii) a moving device configured to move the toner cartridge from the mounting position toward the retreat position. The moving device includes a contact member configured to contact the toner cartridge, and, while the toner cartridge is moving from the retreat position to the mounting position, the contact member is separated from the toner shutter.