Patent ID: 8244162

Claim:
An image forming apparatus comprising: a detachable-body mounted member that is supported by an image forming apparatus body and includes a first opening into which developer flows, a first opening forming member formed around the first opening, a first opening-and-closing member that opens and closes the first opening; a detachable body that is attachable to and detachable from the detachable-body mounted member and includes an accommodating portion that accommodates the developer therein, a second opening that communicates with the first opening when the detachable body is attached to the detachable-body mounted member, and allows the developer accommodated in the accommodating portion to flow into the first opening, a second opening forming member formed around the second opening, and a second opening-and-closing member that opens and closes the second opening; and a sealing portion that is able to be in contact with at least one of (i) and (ii), (i) being the second opening forming member and the first opening-and-closing member, and (ii) being the first opening forming member and the second opening-and-closing member, wherein when the detachable body is being attached or detached from the detachable-body mounted member, the sealing portion seals at least one of (iii) and (iv), (iii) being a gap between a front end face of the second opening forming member in a mounting direction along which the detachable body is attached to the detachable-body mounted member and a rear end face of the first opening-and-closing member in the mounting direction, (iv) being a gap between a rear end face of the first opening forming member in the mounting direction and a front end face of the second opening-and-closing member, and the front end face of the second opening forming member, the rear end face of the first opening-and-closing member, the rear end face of the first opening forming member and the front end face of the second opening-and-closing member are substantially perpendicular to the mounting direction.