Provided is an image forming apparatus, including: a movable image bearing body; an image forming unit for forming a developer image on the image bearing body; a transferring unit for transferring the developer image formed on the image bearing body onto a moving transferring medium; and a control unit for controlling the image forming unit to form a predetermined image composed of a dot image with a predetermined density prior to formation of a normal image, in which a composite image is formed from the normal image and the predetermined image in an area where the normal image is to be formed, and the dot image is formed in a dot area having the normal image and the predetermined image overlapped with each other, with a density determined on the basis of a relationship between a density of the normal image and the predetermined density in the dot area.