A locking apparatus has improved operability and is manufacturable at low cost. The locking apparatus has a fingerprint reader (23), a fingerprint verifier (11), and a power supply circuit. The fingerprint reader reads a fingerprint. The fingerprint verifier verifies the read fingerprint based on registered fingerprint data, and according to a result of the verification, authenticates a person who entered the fingerprint. If the person is authenticated, the locking apparatus unlocks a door locked with the locking apparatus. The locking apparatus comprises a chamber (19) configured to contain the fingerprint reader, a lid (25) configured to open and close the opening of the chamber, and a switch (41) provided for the power supply circuit and configured to interlock with the lid so as to turn on and off the power supply circuit in response to the opening and closing of the lid.