To perform entrance/leaving control with high security by enabling plural persons to simultaneously and promptly enter and leave a room by performing entrance check by iris data by one representative among plural persons to enter and leave the room and further and automatically checking all the persons in a confirmation area before passing a second gate.

When plural persons to enter and leave the room exist, when recognition of the iris data is performed for one person among them, a first gate 3 is opened. Pieces of the iris data are acquired by cameras 14, 15 for respective persons to enter and leave the room who enter the confirmation area 5 and an iris data confirmation processing is performed for all the persons. If an unregistered person is included in them, the second gate 6 is not opened and the fact is informed to a security office, etc. Thus, when the first gate 3 is opened and plural persons simultaneously enter the room, since pieces of the iris data for all the persons are acquired and whether they are registered or unregistered is confirmed in the confirmation area 5, illegal entrance is prevented as smoothing flow of persons at the gate.