1. A subject verification apparatus comprising: a photographing unit for continuously photographing a plurality of subjects; a subject detector for detecting subject images of each of the subjects from a plurality of pieces of image information photographed by the photographing unit; a subject tracking unit for tracking each of the subjects based on movement of the subject images corresponding to each of the subjects, thereby forming tracking information of each of the subjects; a tracking information storage for storing the tracking information of each of the subjects; a subject selector for selecting a subject to be verified from the plurality of subjects based on the tracking information stored in the tracking information storage; and a verification unit for verifying the subject selected by the subject selector.