Seatbelt retracting method

To provide a seatbelt retracting method which can retract the entire quantity of a seatbelt even when the seatbelt is unintentionally engaged with something during retraction of the seatbelt. When a time from engagement between a buckle and a tongue of the seatbelt is released and a motor starts retraction until it stops for the first time is equal to or exceeds a first predetermined value, a state in which retraction is stopped is maintained, and when the time from the motor starts retraction until it stops for the first time is smaller than the first predetermined value, the retracting operation is restarted every time when the retracting operation is stopped until a total time of retracting operation carried by the motor reaches or exceeds a second predetermined value (Fig. 1).