| 摘要 |
A developing device includes a developing chamber which supplies a developer to a developing sleeve, an agitating chamber which is disposed above the developing chamber in a vertical direction, a first conveying screw which is disposed within the developing chamber, a second conveying screw which is disposed within the agitating chamber, a first connecting portion which is formed at one longitudinal end of the developing chamber and pumps the developer from the developing chamber to the agitating chamber, and a second connecting portion which is formed at the other longitudinal end of the developing chamber and at which the developer falls from the agitating chamber to the developing chamber. In the developing device, a replenishing port which replenishes a replenish toner to the developing chamber is provided at a downstream side of the first conveying screw of the developing chamber in a developer conveyance direction.
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