Patent ID: 8515309

Claim:
A developing cartridge comprising: a housing configured to rotatably support a developing roller; and a plurality of conveyance guide members, which are arranged along an axial direction of the developing roller and parallel to each other on an outer side of the housing, and which are configured to guide a recording medium along a conveyance path, wherein the conveyance guide members comprise: conveyance ribs that extend in a conveyance direction of the recording medium orthogonal to the axial direction of the developing roller so as to protrude from the housing toward the conveyance path of the recording medium; and end ribs, which are provided at both end portions in the axial direction of the developing roller and which are inclined outward with respect to the axial direction of the developing roller toward a downstream side in the conveyance direction, wherein the end ribs protrude from the housing by a first distance and the conveyance ribs protrude from the housing by a second distance that is less than the first distance.