A display device includes a display panel which includes a first area, a second area that is folded and unfolded, and a third area sequentially disposed in a first direction, a barrier layer which is disposed below the display panel and includes at least one opening overlapping the second area, a first lower plate which is disposed below the barrier layer and overlaps the first area and a portion of the second area, and a second lower plate which is disposed below the barrier layer and overlaps the third area and another portion of the second area. A width of the at least one opening in the first direction may be less than a distance between the first lower plate and the second lower plate in the first direction.