To allow only a person concerned to unlock a doorway without using a key having a fear of being copied, and to confirm the date or time of setting or using start at any time.

The fingerprint data inputted to a fingerprint input part 21 arranged outside a door 11 provided in a doorway 10 is detected, and detected fingerprint data is collated with a preliminarily registered fingerprint data. When the detected fingerprint data coincides with the registered fingerprint data, an unlocking signal is outputted to unlock the door. At least the date or time of setting or using start is stored in a memory part having date function or time function.