Electronic automobile anti-theft apparatus

An electronic automobile anti-theft apparatus having high reliability includes a motor (23), which moves a lock pin to selectively lock a steering shaft of an automobile. An ECU (31) controls the operation of the motor. A detector (41) generates a detection signal when a shift lever of shift device for a transmission of the automobile is arranged at a parking position. A power transistor (42) goes on in response to the detection signal to permit power to be supplied to the motor,