1. A biometrics authentication system which detects characteristics of a body of a user to perform individual authentication, comprising: a detection device which detects a relevant portion of the body and outputs biometrics data indicating characteristics of the body; a database file which stores at least two different type biometrics data sets for each of a plurality of users, detected by the detection device; and a control unit which verifies the biometrics data detected at the time of authentication against biometrics data registered in the database file, and identifies an individual with biometrics characteristic data for which the verification result is satisfactory, wherein the control unit, at the time of authentication, verifies one type biometrics data set detected by the detection device against one type biometrics data set registered in the database file, and upon judging that similar registered one type biometrics data set exists, verifies another type biometrics data set detected by the detection device against another type biometrics data set registered in the database file, and performs individual authentication.