The authentication failure due to various actions that disperse the holding state of the living body is reduced as compared with the prior art. Based on the imaging unit that images the first living body used for registration or authentication, the acquiring unit that acquires the feature information of the second living body other than the first living body, and the feature information of the second living body information And a control unit that determines whether or not the state of the first living body over the imaging unit is appropriate.生体のかざし状態をばらつかせる様々な行為による認証失敗を、従来技術に比べて低減させる。登録または認証に用いる第１の生体を撮像する撮像部と、第１の生体以外の第２の生体の生体情報の特徴情報を取得する取得部と、第２の生体情報の特徴情報に基づいて、第１の生体の撮像部へのかざし状態が適切であるか否かを判定する制御部と、を備える。
