An image forming apparatus which performs exposure for “n” lines in one scan by scanning “n” light rays from “n” light sources in a main scanning direction of an image carrier, where “n” is an integer greater than 1, including: a laser driving section; and a control section which, corresponding to density unevenness generated in an adjoining section of a nth exposure in a Nth scan and a first exposure in a N+1th scan, determines a correction value of exposure amount to resolve the density unevenness for the nth exposure amount in the Nth scan and the first exposure amount in the N+1th scan, along with that, determines a correction value of each exposure amount for the “n” lines, based on the correction values of the first and nth exposure amount.