Patent ID: 8228167

Claim:
An access control apparatus for controlling whether to permit an access to a premises in accordance with a plurality of pieces of identification information stored in a plurality of identification information storage means, respectively, said access control apparatus comprising: access condition record means for recording an access condition indicating identification information which permits the access to the premises; verification means for checking a plurality of pieces of identification information respectively associated with disparate users, which are individually obtained within a predetermined time, as a single access request, against the access condition; and access condition update means for evaluating a verification result of the verification means and, if the plurality of pieces of identification obtained include first identification information, associated with a first person with access to the premises, which is verified as included in the access condition and second identification information, associated with a second person without access to the premises, which is verified as not included in the access condition, for updating the access condition, wherein the access condition update means is configured for setting a master-slave relationship between the first identification information and second identification information, and changing the access condition of the second identification information carried by the second person to the access condition of the identification of the first person in response to the verification result of first identification information carried by a first person.