SLIDING DOOR DEVICE FOR VEHICLE

A sliding door device includes a door arm including one end portion rotatably connected to one end portion of a door, and the other end portion movable along a side sill of the vehicle body, a lower slider coupled to the second end portion of the door arm and configured to be rectilinearly movable along the side sill of the vehicle body, a lower arm plate connecting the second end portion of the door arm and the lower slider and configured to perform a rotation and a rectilinear movement when the lower slider moves along the side sill, a door power connection portion provided between the lower slider and one end portion of the door arm, and a vehicle power connection portion provided at a position on the vehicle body corresponding to the door power connection portion and electrically connected to the door power connection portion by a rotation of the door arm.