A developing cartridge detachably mountable to a main assembly of an image forming apparatus includes: a frame; a developer carrying member for carrying a developer; a regulating member for regulating a layer thickness of the developer carried on the developer carrying member; a supporting member provided on the frame in a state in which the supporting member supports an end of the regulating member at a first end portion thereof; a grip portion, provided with a spacing from a second end portion of the supporting member opposite from the first end portion of the supporting member, for gripping the developing cartridge; and a sheet member, provided on the supporting member so as to extend from the second end portion toward the grip portion, for covering the second end portion by being bent by an operation for gripping the grip portion.