an image density control method for an image forming apparatus for forming a plurality of exclusive patterns on a photoconductive element , or image carrier , and controlling an image forming condition based on the exclusive patterns so as to control image density . the exclusive patterns include a high density black pattern and a low density white pattern . while a scanner included in the apparatus is brought to and held at a predetermined position , a latent image of the low densit white pattern is electrostatically formed on the photoconductive element . while the scanner is in a reciprocating motion , a latent image of the high density black pattern is formed on the photoconductive element . the plurality of patterns formed on the photoconductive element are sensed to correct toner density and background output based on sensed values , whereby accurate image density control is promoted .