A personal identification apparatus includes a storage device which stores specific information of each of registered persons, an extraction device capable of extracting specific information of an object person from the object person, a classification device which classify whether the object person is included in the registered persons by comparing the pieces of specific information of the registered persons, which are stored in the storage device, with the specific information of the object person, which is extracted by the extraction device, and a registered device operation device configured to sort the order of the pieces of specific information of the registered persons, which are stored in the storage device, in accordance with the use situation of the registered persons, or set whether the registered persons are to be subjected to classification.