A display device includes a display module and a support plate. The display module includes a display panel and a window disposed on the display panel and including a flexible material. In the display module, a folding region foldable about a folding axis and a plurality of non-folding regions adjacent to sides of the folding region are defined on a plane. In a first edge region of the display module, a first end surface of the display panel and a first end surface of the window are substantially aligned with each other, in a second edge region of the display module, a second end surface of the window extends beyond a second end surface of the display panel.