A method of forming an image by an image forming apparatus provided with a print head having plural nozzles, wherein the print head has an overlapping area whose print area overlaps a print area of a physically adjacent print head, or has an overlapping area whose print area overlaps an adjacent scan line on a print sheet surface, includes an image forming step of forming an image by the print head, wherein the image forming step includes a control step of controlling in a variable manner an amount of ink sprayed from a proximity nozzle situated in close proximity of the overlapping area, the proximity nozzle being one of the nozzles situated in a non-overlapping area outside the overlapping area.