Patent ID: 8676093

Claim:
A developing device comprising: a developer carrier that rotates while carrying a developer on a surface thereof; a first developer containing chamber that contains the developer to be supplied to the developer carrier; a second developer containing chamber that has a bottom face disposed at a position lower, in a gravitational direction, than a bottom face of the first developer containing chamber; a first inflow section that allows the developer to flow from the second developer containing chamber into the first developer containing chamber; a second inflow section that allows the developer to flow from the first developer containing chamber into the second developer containing chamber; a first conveyance member that is disposed in the first developer containing chamber and conveys the developer contained in the first developer containing chamber in a first developer conveyance direction going from the first inflow section toward the second inflow section; and a second conveyance member that is disposed in the second developer containing chamber and conveys the developer contained in the second developer containing chamber in a second developer conveyance direction going from the second inflow section toward the first inflow section, wherein the second developer containing chamber contains a first region and a second region, the first region has an area of a cross section, perpendicular to the second conveyance direction, of the second developer containing chamber being substantially constant along the second conveyance direction, and the second region has an area of a cross section, perpendicular to the second conveyance direction, of the second developer containing chamber decreasing along the second developer conveyance direction.