1. A facial feature point position correcting device, comprising: an initial facial feature point position calculating unit which calculates the positions of facial feature points of organs on a face in an image in which the face was shot, based on reliability maps each of which has been generated for each facial feature point from the image to indicate suitability of a feature point of each facial feature point; an off-position facial feature point judgment unit which judges whether or not each facial feature point is an off-position facial feature point as a facial feature point not satisfying a prescribed condition specified based on the position of the facial feature point calculated by the initial facial feature point position calculating unit and based on the position of a corresponding point in a statistical face shape model corresponding to the facial feature point; a facial feature point difference calculating unit which calculates the difference between the position of each facial feature point, excluding those judged as the off-position facial feature points by the off-position facial feature point judgment unit, and the position of the corresponding point corresponding to the facial feature point according to a prescribed evaluation function; and a facial feature point position correcting unit which corrects the determined positions of the facial feature points based on the results of the judgment by the off-position facial feature point judgment unit and the calculation by the facial feature point difference calculating unit.