PROBLEM TO BE SOLVED: To provide a biological information authentication device, a biological information registration device, and a biological information authentication system that can prevent erroneous authentication caused by smallness in the amount of registered biological information used for authentication.SOLUTION: A biological information authentication device 1 is generally configured by being mounted on a vehicle and comprising: a first communication unit 12 that acquires registered biological information 35 from a biological information registration device 3 that reads biological information on a registrant in contact with a second reading surface 300 other than the vehicle and generates the registered biological information 35； a first biological information sensor 10 that reads biological information 15 on a user in contact with a first reading surface 100 having a smaller area than that of the second reading surface 300； and a control unit 14 that performs authentication as to whether the user is the registrant on the basis of the acquired registered biological information 35 and the biological information 15 read by the first biological information sensor 10.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2020,JPO&INPIT【課題】認証に用いられる登録生体情報の情報量が少ないことに起因する誤認証を抑制することができる生体情報認証装置、生体情報登録装置及び生体情報認証システムを提供する。【解決手段】生体情報認証装置１は、車両以外において第２の読取面３００に接触する登録者の生体情報を読み取って登録生体情報３５を生成する生体情報登録装置３から登録生体情報３５を取得する第１の通信部１２と、第２の読取面３００より小さい面積を有する第１の読取面１００に接触するユーザの生体情報１５を読み取る第１の生体情報センサ１０と、取得した登録生体情報３５と第１の生体情報センサ１０が読み取った生体情報１５とに基づいて当該ユーザが登録者であるか否かの認証を行う制御部１４と、を備えて車両に搭載されて概略構成されている。【選択図】図３
