Abstract: A display device includes a display unit and a roller configured to wind or unwind the display unit, and comprising a flat portion, a first curved portion extending from the flat portion, and a second curved portion extending from the first curved portion toward the flat portion, in which a radius of curvature of the first curved portion is larger than a radius of curvature of the second curved portion, and a radius of curvature of the display unit wound around the second curved portion is larger than the radius of curvature of the second curved portion, thus the second curved portion is formed to support the display unit so that the display unit is not curved with a small radius of curvature between the first curved portion and the flat portion.