PURPOSE: To prevent an accident by stopping the opening and closing control to a door when an overcurrent flows to a motor for door driving for a specific time or longer.

CONSTITUTION: A motor current detecting means 10 detects the motor current in the door opening/closing operation, and when the motor current is made at a specific value or higher becoming to an overcurrent, an overcurrent time measuring means 11 measures the time being at an overcurrent condition. And a control stop instruction means 12 is made to output a control stop instruction only in case of the overcurrent time more than a specific time. A door opening/ closing control means 13 is made to stop the door opening/closing control depending on the control stop instruction. As a result, the door can be opened and closed smoothly, and an accident such that a passanger is caught to the door can be prevented.