DEVELOPING DEVICE AND IMAGE FORMING APPARATUS

PROBLEM TO BE SOLVED: To provide a developing device and an image forming apparatus capable of preventing a reduction in image quality.SOLUTION: A developing device includes: a developer carrier that causes developer to be attached to an electrostatic latent image carrier to develop an electrostatic latent image; a first supply member that is arranged below the developer carrier in a non-contact manner, and supplies developer to the developer carrier; a second supply member that is arranged below the first supply member and in contact with the first supply member, and supplies developer to the first supply member; and a developer retaining unit that retains the developer supplied to the second supply member. The first supply member and the second supply member each rotate such that both surfaces move in the same direction at a counter part of both supply members.