A display device (DD), comprising: a display module (DM) with a display region (DA) and a non-display region (NDA), comprising a display panel (DP) configured to display an image (IM), and a window (WM) disposed on the display panel (DP) and comprising a flexible material, wherein a folding region (FA) foldable about a folding axis (FX), and a plurality of non-folding regions (NFA1, NFA2) disposed adjacent to a first side and a second side of the folding region (FA) are defined on a plane of the display module (DM); and a support plate (SM) disposed under the display module (DM), 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 (EA1) of the display module (DM) 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 (DP) and a first end surface (WM-ES1) of the window (WM) are substantially aligned with each other, and the non-display region (NDA) has, when viewed in a third direction substantially perpendicular to both the first and the second direction, a first width (w1) in the first edge region (EA1), characterized in that in a second edge region (EA2) of the display module (DM) 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 (WM) extends beyond a second end surface (DP-ES2) of the display panel (DP) and the non-display region (NDA) has a second width (w2) in the second edge region (EA2), wherein when viewed in said third direction, the second width (w2) is larger than the first width (w1). a display module (DM) with a display region (DA) and a non-display region (NDA), comprising a display panel (DP) configured to display an image (IM), and a window (WM) disposed on the display panel (DP) and comprising a flexible material, wherein a folding region (FA) foldable about a folding axis (FX), and a plurality of non-folding regions (NFA1, NFA2) disposed adjacent to a first side and a second side of the folding region (FA) are defined on a plane of the display module (DM); and a support plate (SM) disposed under the display module (DM), 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 (EA1) of the display module (DM) 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 (DP) and a first end surface (WM-ES1) of the window (WM) are substantially aligned with each other, and the non-display region (NDA) has, when viewed in a third direction substantially perpendicular to both the first and the second direction, a first width (w1) in the first edge region (EA1), characterized in that in a second edge region (EA2) of the display module (DM) 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 (WM) extends beyond a second end surface (DP-ES2) of the display panel (DP) and the non-display region (NDA) has a second width (w2) in the second edge region (EA2), wherein when viewed in said third direction, the second width (w2) is larger than the first width (w1). <EOS>