PROBLEM TO BE SOLVED: To provide a biometric authentication device and a portable electronic device capable of improving authentication accuracy.SOLUTION: A biometric authentication device comprises: a housing on which a living matter sensor for acquiring living matter information is provided a detection part for detecting information related to contact of the living matter to the housing a determination part for determining a collation area with the living matter information which is acquired by the living matter sensor, according to the detection result of the detection part, among areas of the living matter information which are registered in advance and a collation part for collating the living matter information in the collation area and the living matter information acquired by the living matter sensor.COPYRIGHT: (C)2015,JPO&INPIT【課題】 認証精度を向上させることができる生体認証装置および携帯型電子装置を提供する。【解決手段】 生体認証装置は、生体情報を取得する生体センサが設けられた筐体と、前記筐体に対する生体の接触に係る情報を検出する検出部と、予め登録されている生体情報の領域のうち、前記検出部の検出結果に応じて、前記生体センサが取得した生体情報との照合領域を決定する決定部と、前記照合領域の生体情報と、前記生体センサが取得した生体情報との照合を行う照合部と、を備える。【選択図】 図1
