Patent ID: 7747193

Claim:
A developing device comprising: a cabinet; a developer carrier that is supported in the cabinet and is configured to carry developer; a transport member that is supported in the cabinet and is configured to rotate around a transport member shaft and transport the developer to the developer carrier, the transport member shaft extending along a longitudinal direction of the developer carrier; and a developer cartridge that is attachable to and detachable from the cabinet and accommodates the developer, wherein the developer cartridge includes: a cartridge side first opening that is configured to supply the developer to the cabinet; and a cartridge side second opening that is configured to receiver the developer from the cabinet; wherein the cabinet includes: a cabinet side first opening that is located in a position opposed to the cartridge side first opening and is configured to receive the developer from the cartridge side first opening; and a cabinet side second opening that is located in a position opposed to the cartridge side second opening and is configured to supply the developer to the cartridge side second opening, wherein each of the cartridge side first opening, the cartridge side second opening, the cabinet side first opening and the cabinet side second opening extends in a substantially vertical direction, wherein the transport member configured to transport the developer from the cabinet side first opening to the cabinet side second opening, wherein a lower end of the cabinet side second opening is located in a position higher than a center of the transport member shaft in a vertical direction, and wherein the lower end of the cabinet side second opening is located in a position higher than the lower end of the cabinet side first opening in the vertical direction.