A seatbelt system of the type including a seatbelt, a flexible tape having a plurality of holes along its length and which is coupled to the seatbelt to cause the seatbelt to automatically fasten and unfasten from a passenger and a moving means for causing movement of the flexible tape. The moving means includes a sprocket housing having a substantially circular recess formed therein, a sprocket wheel provided in a portion of the flexible tape, a pair of tape passage shaped channel which is formed in the housing and accommodates the portion of the flexible tape, a pair of tape passage channels which are formed in the sprocket housing tangential to the arc-shaped channel and which are oriented in opposite directions and a driving means for selectively rotating the sprocket a predetermined number of rotation in a clockwise and counterclockwise direction.