Patent ID: 8107850

Claim:
A developing device comprising: a housing that stores developing agent and has an opening; a developing agent carrier that is rotatably supported by the housing, the developing agent carrier holding the developing agent on an outer circumferential surface of the developing agent carrier; a developing agent leakage prevention member that is provided in the housing outside the opening in a longitudinal direction of the developing agent carrier, the developing agent leakage prevention member preventing leakage of the developing agent from a space between an opposing area of the housing opposing a longitudinal end of the developing agent carrier and the outer circumferential surface of the longitudinal end of the developing agent carrier, wherein the developing agent leakage prevention member comprising: a first layer that is configured to contact the outer circumferential surface of the longitudinal end of the developing agent carrier; a second layer that is superimposed on the first layer and is configured to contact the opposing area of the housing; and an adhesive layer that is interposed between the first layer and the second layer, the adhesive layer partially bonding a first opposing surface of the first layer opposing the second layer to a second opposing surface of the second layer opposing the first layer such that an unbonded area where the first opposing surface and the second opposing surface are not bonded together is produced.