Patent attributes
A sliding door for a vehicle includes a rail unit may include a center rail provided on an outer surface of a rear side inner panel in a longitudinal direction of the vehicle body, and an auxiliary rail provided along a lower end of the center rail, a drive unit that has front and rear pulleys respectively provided at front and rear sides of an inner surface of the rear side inner panel, and a wire wound around the front and rear pulleys to be moved by a driving power of a driving motor, a roller bracket that is provided at the center rail to be slidably moved, and is connected to both ends of the wire to be moved along the center rail by the driving power, and a door whose one side is fixed to the roller bracket to be slid with respect to the vehicle body.