A developing cartridge (B1) that is mountable to an apparatus main assembly (A1) of an image forming apparatus, the apparatus main assembly (A1) having mounted a photosensitive drum separately from the developing cartridge (B1), the developing cartridge (B1) comprising: a developing roller ; a frame supporting the developing roller ; a movable part movably supported by the frame so as to be movable to a first position and to a second position relative to the frame ; an elastic part provided between the frame and the movable part , and to urge the movable part ; a drive input member for receiving input of rotational force to rotate the developing roller ; and an electrode portion for electrically connecting to the apparatus main assembly (A1), wherein the movable part includes a force receiving part capable to receive an external force in a direction of moving from the first position to the second position, wherein the configuration of the developing cartridge is such that, when the movable part receives the external force at the force receiving part and is at the second position, the movable part receives an urging force (FH10) from the elastic part in a direction of moving the movable part from the second position to the first position, wherein the drive input member is movable in a rotational axis direction of the drive input member , and wherein the surface of the electrode portion is exposed from the developing cartridge (B1), and intersects a movement direction in which the force receiving part of the movable part moves when the movable part moves from the first position to the second position in a movement direction (W), wherein the electrode portion is at the downstream side of the movement direction (W). a developing roller ; a frame supporting the developing roller ; a movable part movably supported by the frame so as to be movable to a first position and to a second position relative to the frame ; an elastic part provided between the frame and the movable part , and to urge the movable part ; a drive input member for receiving input of rotational force to rotate the developing roller ; and an electrode portion for electrically connecting to the apparatus main assembly (A1), wherein the movable part includes a force receiving part capable to receive an external force in a direction of moving from the first position to the second position, wherein the configuration of the developing cartridge is such that, when the movable part receives the external force at the force receiving part and is at the second position, the movable part receives an urging force (FH10) from the elastic part in a direction of moving the movable part from the second position to the first position, wherein the drive input member is movable in a rotational axis direction of the drive input member , and wherein the surface of the electrode portion is exposed from the developing cartridge (B1), and intersects a movement direction in which the force receiving part of the movable part moves when the movable part moves from the first position to the second position in a movement direction (W), wherein the electrode portion is at the downstream side of the movement direction (W). <EOS>