A display device , comprising: a bottom member ; a display panel on the bottom member , the display panel configured to emit light; a top member on the display panel ; a touch screen panel on the top member ; a transparent member on the touch screen panel ; a first adhesive between the top member and the touch screen panel ; a second adhesive between the touch screen panel and the transparent member ; a bent portion extending across the display panel and the touch screen panel such that the display panel and the touch screen panel are bent in the bent portion along a first direction, wherein the display panel and the touch screen panel are continuously provided over the bent portion such that the display panel can display an image from a rear surface of the display device; and a groove region (GR) at the bent portion of the display device , wherein the groove region (GR) comprises: a first groove (G1) in at least a portion of the top member at the bent portion of the display device ; a second groove (G2) in at least a portion of the bottom member at the bent portion of the display device ; a third groove (G3) in at least a portion of the transparent member and the second adhesive at the bent portion of the display device ; and a fourth groove (G4) in at least a portion of the first adhesive at the bent portion of the display device , wherein the first groove (G1), the second groove (G2), the third groove (G3) and the fourth groove (G4) coincide in position along the bent portion and extend along the bent portion in a second direction, perpendicular to the first direction. a bottom member ; a display panel on the bottom member , the display panel configured to emit light; a top member on the display panel ; a touch screen panel on the top member ; a transparent member on the touch screen panel ; a first adhesive between the top member and the touch screen panel ; a second adhesive between the touch screen panel and the transparent member ; a bent portion extending across the display panel and the touch screen panel such that the display panel and the touch screen panel are bent in the bent portion along a first direction, wherein the display panel and the touch screen panel are continuously provided over the bent portion such that the display panel can display an image from a rear surface of the display device; and a groove region (GR) at the bent portion of the display device , wherein the groove region (GR) comprises: a first groove (G1) in at least a portion of the top member at the bent portion of the display device ; a second groove (G2) in at least a portion of the bottom member at the bent portion of the display device ; a third groove (G3) in at least a portion of the transparent member and the second adhesive at the bent portion of the display device ; and a fourth groove (G4) in at least a portion of the first adhesive at the bent portion of the display device , wherein the first groove (G1), the second groove (G2), the third groove (G3) and the fourth groove (G4) coincide in position along the bent portion and extend along the bent portion in a second direction, perpendicular to the first direction. a first groove (G1) in at least a portion of the top member at the bent portion of the display device ; a second groove (G2) in at least a portion of the bottom member at the bent portion of the display device ; a third groove (G3) in at least a portion of the transparent member and the second adhesive at the bent portion of the display device ; and a fourth groove (G4) in at least a portion of the first adhesive at the bent portion of the display device , wherein the first groove (G1), the second groove (G2), the third groove (G3) and the fourth groove (G4) coincide in position along the bent portion and extend along the bent portion in a second direction, perpendicular to the first direction. <EOS>