To provide a sliding door capable of easily forming an opening part on the one end side or the other end side of a room.

This sliding door opens and closes an opening part formed by providing a room opening part of a room E. The sliding door includes three doors 1 comprising a center door 11, and one side door 12 and the other side door 13 adjacent to the center door 11 which are arranged in parallel, and two doors of which can be moved interlocking with each other, a support part 2 having an upper support part 21 and a lower support part for slidably supporting the doors 1 to form an opening part on one end E1 side of the room E in the one door fixed and overlap state where the fixed one door 12 overlaps the center door 11, and on the other end E2 side of the room E in the other door fixed and overlap state, and the other door stopper 4 and one door stopper 3 provided on the lower support part to abut on the other door 13 in the one door fixed and overlap state and one side door 12 in the other side door fixed and overlap state, respectively to inhibit the above movement.