SLIDING DOOR DEVICE FOR VEHICLE

A sliding door device for a vehicle includes a door panel for opening and closing a door opening and covered by an upper trim and a lower trim, and a center rail mounted on the door panel to extend in a longitudinal direction of the vehicle body and providing a path for a center roller mounted on a center portion of the vehicle body, wherein a lower portion of the upper trim and an upper portion of the lower trim are disposed to overlap each other vertically. The center roller is mounted on a center roller mounting bracket including a first surface extending toward the vehicle body to be vertical to the door panel, a second surface bent from the first surface toward a lower side of the vehicle body, and a third surface extending from the second surface toward the vehicle body to be vertical to the door panel.