Patent ID: 8701348

Claim:
A slide door device for a vehicle, comprising: a body side lower rail which is disposed below a door opening formed on a side of a vehicle body and extends in a front-rear direction of the vehicle; a body side rail which is disposed above the body side lower rail and behind the door opening and extends in the front-rear direction; a door side lower guide roller unit which is connected to a slide door, which opens and closes the door opening, and configured to slide on the body side lower rail; a door side guide roller unit which is connected to the slide door and configured to slide on the body side rail; a door side lower rail which is disposed in a lower portion of the slide door positioned below a floor surface in the door opening and extends in the front-rear direction; a body side lower guide roller unit which is connected to the lower portion of the door opening and configured to slide on the door side lower rail; and wherein the body side lower rail and the door side lower rail overlap in an upper-lower direction of the vehicle in the fully closed state of the door.