A biometrics authentication system detect body characteristics, verify the characteristics against registered biometrics data to perform individual authentication. In 1:n authentication, a plurality of different type biometrics database sets of a user are registered in a database, and at the time of verification of one type biometrics data set with one type registered biometrics data set, the control unit judges whether similar biometrics data sets of other person are registered, and if other person's similar biometrics data sets are registered, performs verification of each of the another type biometrics data sets of the plurality of similar biometrics data sets with the detected another type biometrics data set, and identifies the individual in question.