A display apparatus, comprising: a substrate having a first area, a second area, and a bending area between the first area and the second area along a first direction in which top and bottom surfaces of the substrate extend, the substrate being bent at the bending area such that a bottom surface of the substrate in the second area faces the bottom surface of the substrate in the first area; a display unit on the top surface of the substrate in the first area, the display unit including a pixel electrode and being arranged to display images to users facing the top surface of the substrate; a protection film arranged on the bottom surface of the substrate in the first area and including a light blocking layer overlapping with the display unit and blocking external light from background; and a supporting layer interposed between the second area of the substrate and the first area of the substrate, characterized in that the protection film includes: a first adhesive layer having a first surface that faces the bottom surface of the substrate; a protection film base having a first surface that faces a second surface, opposite the first surface, of the first adhesive layer; and said light blocking layer having a first surface that faces a second surface, opposite the first surface, of the protection film base; a heat sink film adjacent a second surface, opposite the first surface, of the light blocking layer; and a second adhesive layer between the light blocking layer and the heat sink film, an area of the heat sink film being smaller than an area of the second adhesive layer such that a part of the second adhesive layer adjacent to the bending area is exposed out of the heat sink film, wherein the supporting layer contacts the part of the second adhesive layer not covered by the heat sink film. a substrate having a first area, a second area, and a bending area between the first area and the second area along a first direction in which top and bottom surfaces of the substrate extend, the substrate being bent at the bending area such that a bottom surface of the substrate in the second area faces the bottom surface of the substrate in the first area; a display unit on the top surface of the substrate in the first area, the display unit including a pixel electrode and being arranged to display images to users facing the top surface of the substrate; a protection film arranged on the bottom surface of the substrate in the first area and including a light blocking layer overlapping with the display unit and blocking external light from background; and a supporting layer interposed between the second area of the substrate and the first area of the substrate, characterized in that the protection film includes: a first adhesive layer having a first surface that faces the bottom surface of the substrate; a protection film base having a first surface that faces a second surface, opposite the first surface, of the first adhesive layer; and said light blocking layer having a first surface that faces a second a first adhesive layer having a first surface that faces the bottom surface of the substrate; a protection film base having a first surface that faces a second surface, opposite the first surface, of the first adhesive layer; and said light blocking layer having a first surface that faces a second surface, opposite the first surface, of the protection film base; a heat sink film adjacent a second surface, opposite the first surface, of the light blocking layer; and a second adhesive layer between the light blocking layer and the heat sink film, an area of the heat sink film being smaller than an area of the second adhesive layer such that a part of the second adhesive layer adjacent to the bending area is exposed out of the heat sink film, a heat sink film adjacent a second surface, opposite the first surface, of the light blocking layer; and a second adhesive layer between the light blocking layer and the heat sink film, an area of the heat sink film being smaller than an area of the second adhesive layer such that a part of the second adhesive layer adjacent to the bending area is exposed out of the heat sink film, wherein the supporting layer contacts the part of the second adhesive layer not covered by the heat sink film.