To enhance safety and security in an electric lock having a plurality lock sections capable of being mechanically locked/unlocked.

The electric lock has at least two lock sections 1 which can be electrically locked/unlocked, has a cylinder and capable of being mechanically locked/unlocked by a key. Unless all the lock sections are unlocked within a specified time after any one of the lock sections is unlocked, the unlocked lock sections are electrically locked. Even though the lock can be locked/unlocked by the key, unless at least two lock sections are unlocked within a specified time, the lock sections once unlocked are locked again. Therefore, all the lock sections can hardly be unlocked by picking.