A display device, comprising: a display module with a display region and a non-display region, comprising a display panel configured to display an image, and a window disposed on the display panel and comprising a flexible material, wherein a folding region foldable about a folding axis, and a plurality of non-folding regions (NFA1, NFA2) disposed adjacent to a first side and a second side of the folding region are defined on a plane of the display module; and a support plate disposed under the display module, wherein the display module comprises a plurality of side surfaces each of said side surfaces being parallel to a first direction or a second direction that is substantially perpendicular to said first direction, in a first edge region of the display module on a first side surface parallel to the first direction of the plurality of side surfaces, a first end surface (DP-ES1) of the display panel and a first end surface (WM-ES1) of the window are substantially aligned with each other, and the non-display region has, when viewed in a third direction substantially perpendicular to both the first and the second direction, a first width in the first edge region, characterized in that in a second edge region of the display module on the first side surface parallel to the first direction of the plurality of side surfaces, a second end surface (WM-ES2) of the window extends beyond a second end surface (DP-ES2) of the display panel and the non-display region has a second width in the second edge region, wherein when viewed in said third direction, the second width is larger than the first width. a display module with a display region and a non-display region, comprising a display panel configured to display an image, and a window disposed on the display panel and comprising a flexible material, wherein a folding region foldable about a folding axis, and a plurality of non-folding regions (NFA1, NFA2) disposed adjacent to a first side and a second side of the folding region are defined on a plane of the display module; and a support plate disposed under the display module, wherein the display module comprises a plurality of side surfaces each of said side surfaces being parallel to a first direction or a second direction that is substantially perpendicular to said first direction, in a first edge region of the display module on a first side surface parallel to the first direction of the plurality of side surfaces, a first end surface (DP-ES1) of the display panel and a first end surface (WM-ES1) of the window are substantially aligned with each other, and the non-display region has, when viewed in a third direction substantially perpendicular to both the first and the second direction, a first width in the first edge region, characterized in that in a second edge region of the display module on the first side surface parallel to the first direction of the plurality of side surfaces, a second end surface (WM-ES2) of the window extends beyond a second end surface (DP-ES2) of the display panel and the non-display region has a second width in the second edge region, wherein when viewed in said third direction, the second width is larger than the first width.