An image forming apparatus includes: a bottle (100) which is detachably mounted on an apparatus body to store toner; a shutter (301) which is disposed on the bottle to open and close a discharge port (300a) which discharges the toner; and a shutter slider (213) which is disposed in the apparatus body to open and close the shutter by engaging therewith along with an insertion operation of the bottle. The shutter slider (213) is disposed to be movable from a first position, which allows the shutter (301) to be located at a closed position at which the discharge port (300a) is closed by the shutter when the bottle is mounted on the apparatus body, to a second position, in which the discharge port (300a) is to be opened and closed by the shutter (301) along with an operation of attaching and detaching the bottle to and from the apparatus body.