A developing apparatus includes a mode in which a control of differentiating a relationship between a rotational speed (Vsc) of a conveying portion (31 and 32) and a rotational speed (Vsl) of a developer carrier (6) in forming no image from that in forming an image is executed. In the mode, the developing apparatus executes at least one of controls of restraining a trouble otherwise caused by the control of differentiating the relationship such as a control of decreasing a ratio of rotational speeds (Vsc/Vsl) as compared to the ratio of rotational speeds in forming the image, a control of circulating the developer between first and second chambers by driving the conveying portion (31 and 32) and the developer carrier (6) at rotational speeds lower than those in forming the image.