Patent ID: 8270871

Claim:
An accommodating container, which is detachably attached to a container receiver of an image forming apparatus housing and accommodates imaging material therein, the accommodating container comprising: a container main body that has an opening at a part of the container main body, and accommodates the imaging material; a cap member that is detachably attached to an opening edge of the container main body, and that envelopes an outer periphery wall of the container main body, and is pushed into the container main body up to an attachment position; and a seal member that is held by the cap member or the container main body, and that, when the cap member has been attached in the attachment position of the container main body, fills between the opening edge and the cap member and provides a seal between the opening edge and the cap member, wherein the seal member includes a plurality of seal abutment pieces that abut on a wall surface of the cap member or a wall surface of the container main body, and are elastically deformable, and at least one of the seal abutment pieces is arranged in non-contact with the wall surface of the cap member in a first state before the cap member is attached to the container main body, and is arranged in contact with the wall surface of the cap member in a second state where the cap member has been attached in an attachment position of the container main body.