1. An individual identifying apparatus comprising: an image pick up unit for photographing one of irides and retinas of a one eye of a person to be identified; a position fixing unit for fixing a position of said image pick up unit, while extraneous light is shielded under such a condition that the one eye of the person to be identified is directed opposite to said image pick up unit; a first lighting unit for emitting photograph-purpose illumination light with respect to the one eye of the person to be photographed inside said position fixing unit; and an individual identifying unit for identifying an individual based upon a picture of the one eye which is photographed by said image pick up unit.