An image forming apparatus includes a rotatable bottle which is detachably attached to an apparatus main body and which stores toner, the rotatable bottle having a discharge port from which the stored toner is discharged, a shutter which is disposed on the bottle, and which opens and closes the discharge port, and an engaging member, which is movably disposed on the apparatus main body, and which is able to engage the shutter. The image forming apparatus further includes a driving portion which transfers a driving force to the rotatable bottle, and an opening mechanism which is configured to open the shutter by the driving force from the driving portion.