Patent ID: 8145101

Claim:
A developing device, comprising: a developer carrier, which rotates while carrying a developer on a surface thereof, supplies a toner to a latent image on a surface of a latent image carrier at a section where the developer carrier faces the latent image carrier, and develops the latent image; a developer conveyance path, which has a developer conveying member conveying the developer, and conveys the developer while supplying the developer to the developer carrier in a developer supply region in which the developer is supplied to the developer carrier; a developer replenishing port which replenishes the developer to the developer conveyance path; a discharge conveyance path for conveying the developer to the outside of the developing device; a discharge conveying member, which applies a conveying force to the developer within the discharge conveyance path; and a developer discharging port which discharges at least part of the developer within the developer conveyance path to the discharge conveyance path in the form of a discharged developer, wherein a shock is applied intermittently to the discharged developer within the discharge conveyance path inside a developing casing provided with at least the developer carrier and the developer conveyance path.