Method of controlling a seatbelt retracting device with a motor and corresponding device

In order to provide a method of controlling a seatbelt retracting device (1) with a motor (5) in which positive retraction can be achieved in a normal state, and a significant feeling of pressure is prevented when a part of the body of an occupant is caught in the seat belt, an instruction to drive a seatbelt retractor by a motor (5) is issued to a motor control circuit (6), the motor control circuit (6) starts power distribution to the motor (5), and a clutch (3) is connected to the seatbelt retractor (1) and a reduction gear (4). Power distribution to the motor (5) is detected by a current detecting circuit (7), and a feedback is given to the motor control circuit (6). The motor control circuit (6) reads a current value detected by a current detecting circuit (7) at predetermined time intervals, and calculates a difference value with respect to the previously read value. When the difference value of the current reaches or exceeds a predetermined threshold, the power distribution to the motor (5) is stopped.