An area signal generation unit and a logical operation circuit control a dot pattern forming unit which forms a dispersed dots image by dispersing dot developer images each having the area of at least one dot, so as not to form a dot pattern in the area of a patch image to be formed by a patch image forming unit or the sensing area of the patch image. An image forming apparatus capable of avoiding the influence of a dispersed dots image on a patch image with suppressing nonuniformity caused by a line-like image when forming a patch image for color stabilization control, is provided.