A display device includes a plate-shaped display unit; a mounting unit disposed on a back surface side of the display unit, a direction normal to a back surface of the display unit being a thickness direction of the mounting unit; an erect portion that erects towards the back surface side of the display unit along a lateral side of the mounting unit, the erect portion protruding towards a display unit side in a greater manner than the mounting unit; and a plate material that opposes the back surface of the display unit and that is interposed between the display unit and the erect portion.