A display device includes a display module, a support part including a support plate and a plurality of support bars, and first and second cases coupled to each other. The first case accommodates the display module, the support part, and the support frame, and the second case moves in a direction that is away from or closer to the first case along a first direction. When the second case moves along the first direction away from the first case, support bars of the support bars are parallelly arranged together with the support plate at one side of the support plate, and the support frame is expanded in the first direction and supports the support bars that are arranged parallelly with the support plate.