In an image forming apparatus when a transfer material is fed at a first speed, a moving speed of an image bearing member, an exposure speed of an exposure device in a moving direction of the image bearing member, and a moving speed of an intermediary transfer member are equal to the first speed. When the transfer material is fed at a second speed which is lower than the first speed, the moving speed of the image bearing member is equal to the first speed, and the exposure speed of the exposure device and the moving speed of the intermediary transfer member are equal to the second speed.