An authentication apparatus and authentication method which can improve the authentication accuracy are provided. The authentication apparatus consecutively picks up a biological authentication object of a predetermined biological part from different directions in series, and maps a plurality of images which are obtained as the consecutive image pickup result in series to a body of a figuration corresponding to the biological part with a point on the biological authentication object in the images being the criteria, and registers the respective images mapped to the body in a storage medium as information for collation with an image to be collated which is obtained by picking up an image from an arbitrary direction.