A display device includes a display panel including a non-bending area and a bending area, a bending protection layer disposed on the display panel and bent together with the bending area, a polarization unit disposed on the display panel, overlapping the non-bending area, where a step is defined on an upper surface of the polarization unit, a light shielding film adhered to one area of the bending protection layer and the step and covering a bent portion of the display panel in a plan view, where the light shielding film is a rigid board, and a coating window disposed directly on the polarization unit and the light shielding film and including a material cured by laser irradiation. The step has a shape corresponding to the light shielding film, and a side surface of the light shielding film is in contact with the step on a cross section.