1. A person recognition apparatus, comprising: an input unit to input image data; a face detection unit to detect a face area in which a face of a person is expressed from the inputted image data, and to output a score which takes a large value in accordance with facial likeness; a facial feature point detection unit to detect an angle of a face direction from a feature point of the detected face area; a feature extraction unit to calculate a first feature amount for personal identification from the feature point detected by the facial feature point detecting unit; a feature data administrative unit to store a second feature amount of each person including information indicating a feature of a face of the relevant person, for each person; a person identification unit to calculate a similarity between the first feature amount calculated by the feature extraction unit and the second feature amount stored in the feature data administrative unit; a number of candidates calculation unit which displays the facial images stored in the feature data administrative unit in descending order of the similarity calculated by the person identification unit, and calculates a number of facial images to be displayed in accordance with the score outputted from the face detection unit and the angle of the face direction outputted from the facial feature point detection unit; a candidate confirmation unit in which retrieval candidates of the facial images displayed in descending order of the similarity are subjected to visual inspection, and which calculates again the number of the facial images displayed by the number of candidates calculation unit in accordance with increase or decrease of the number of candidates to be confirmed; and an output unit to output whether or not the image data inputted by the input unit has been stored in the feature data administrative unit, as a result of the confirmation of the candidate confirmation unit.