A locking apparatus has a lock driver to electrically lock and unlock a door, a fingerprint read/verify unit to receive a fingerprint from a user, verify the received fingerprint by comparing it with registered fingerprint data) and if the fingerprint verification authenticates the user, enable the lock driver to electrically operate, a key cylinder attached to the door, an interlink linking the key cylinder with the lock driver, and a key to manually operate the lock driver in cooperation with the key cylinder and the interlink.