Patent ID: 8489000

Claim:
A developing apparatus, comprising: a developer container configured to store a developer; a conveyance member provided with a helical blade and configured to convey the developer in the developer container; a discharge port configured to discharge the developer in the developer container, wherein the discharge port is provided on the developer container at a position that is on one end side from a central portion of the conveyance member with respect to an axial direction of the conveyance member and that faces the conveyance member, wherein the conveyance member has a region in which the helical blade is not formed or an outer diameter of the helical blade is small at least at a portion facing the discharge port; and a positioning member unmovable in an axial direction of the conveyance member with respect to the conveyance member and configured to position the conveyance member in the axial direction with respect to the developer container by being abutted on the one end side of the developer container at least when the conveyance member is being driven.