Abstract: In a passive seat belt system, the outboard ends of the lap and shoulder belts are respectively mounted at upper and lower locations on the vehicle door. The inboard ends of the lap and shoulder belts are joined together and are attached to a pivot belt having an inboard end fixedly mounted on the vehicle body substantially forward of the inboard occupant hip. The pivot belt has a fixed length adapted to define an arcuate path of horizontal swinging movement of the inboard ends of the lap and shoulder belts between restraining positions adjacent the inboard occupant hip when the door is closed and a stowed position substantially forwardly of the occupant hip when the door is open. A control belt is connected to the juncture of the lap, shoulder and pivot belts.