To control an electric lock by applying the ready-made electric lock as it is without requiring no processing circuit for complicated data and completely removing wirings between an electric lock controller and the electric lock.

An electric conduction unit 5 separated into a door-side unit 11 and a door-frame side unit 12 is disposed between an electric lock controller 4 and an electric lock 1. A coil 20 for an oscillator 17 in the unit 12 transmits a control signal at a high level or a low level in response to the presence of the control of the electric lock 1. The control signal is received by a coil 13 in the unit 11 electromagnetically coupled with the coil 20. When the control signal at a specified level or more is decided by a level decision circuit 14, a driving signal is output to an actuator 6. A monitor signal indicating the state of locking or release is transmitted from a coil 15 through a lock monitor switch 7 under a closed state by the control signal received by the coil 13. The monitor signal is received to a coil 22 for the unit 12, and changed into DCs and input to the electric lock controller 4. The contact of a switch 19 in the unit 12 is closed by the magnetic action of a magnet 16 at the time of door closing, and a monitor signal indicating 'door closing' is input to the electric lock controller 4.