To provide an image forming apparatus including a plurality of laser scanning units having deflecting and scanning means which deflect and scan light fluxes emitted from a plurality of light sources, respectively; a plurality of image bearing members on which electrostatic latent images are formed by scanning the light fluxes by means of the deflecting and scanning means; and a plurality of development units which develops the electrostatic latent image formed on each of the plurality of image bearing members with toners of colors with different brightness; wherein the rotational phases of the plurality of deflecting and scanning means are controlled, respectively, based on the light flux for scanning an image bearing member on which a toner image of which color has a lower brightness among a plurality of image bearing members which is scanned by the deflecting and scanning means is formed.

 
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