There is provided a biometric authentication system including a plurality of information processing devices divided to a first group for performing a primary authentication based on feature quantity information unique to a biological pattern of a user associated with biological information, and specifying an identification number assigned to the user, and a second group for performing a secondary authentication on the biological information that succeeded in the primary authentication based on the identification number and registered biological information registered in advance. The input biological information is transmitted to all information processing devices belonging to the first group, the biological information that succeeded in the primary authentication is added as queuing information to a queue, and each of the information processing devices belonging to the second group acquires the queuing information positioned at a head of the queue when the secondary authentication process being executed in the own device is terminated.