Abstract: A safety stopping device particularly adapted for use with an electric steel rolling door is disclosed which comprises a transmitter mounted on a base plate of the rolling door and a receiver mounted on and directly connected to the electric motor used for driving the rolling door. In addition, various transmit switches are mounted on the underside of the aforementioned base plate to indicate to the transmitter when an obstruction is encountered. Upon occurring an obstruction, a signal is transmitted to the receiver whereupon the flow of current to the electric motor is interrupted to cause the electric rolling steel door to automatically stop.