Belt Tear Detector immediately detects conveyor belt tear accident caused by foreign substance piercing the conveyor belt at the outlet of chute of conveyor, in order to stop the belt conveyor. Belt Tear Detector consists of sensor to detect the belt tear accident and transducer to output breakage signal. Belt Tear Detector is high safety sensor since the transducer is equipped with wire-breakage alarm output to detect the breakage of cable of sensor. Sensors are installed according to the number of Impact Rollers. Since the wiring is loop connection between sensors and to transducer, it is possible to save the wiring cost.