1. An image density discrimination chart for discrimination of a density or an image, usable with an image forming apparatus, said image density discriminating chart comprising: an exposure portion for being overlapped on an image density discrimination pattern printed on a recording material, and exposing an image density discrimination pattern; and a plurality of comparison patterns which have densities different from each other, disposed aroud said exposure portion, which is to be compared with the image density discrimination pattern exposed through said exposure portion.