Provided is an attachable/detachable display device comprising a polarizing film, the display device allowing a damaged window to be easily replaced, the window to be simply detached therefrom, a manufacturing process therefor to be simplified, and manufacturing unit costs therefor to be lowered, and being variously designable. The display device comprises: a touch screen; the polarizing film; the window; and an adhesiveness adjusting layer, which is on any one of the polarizing film, the touch screen and a touch screen cover layer attached to the touch screen, and is on at least one side of the polarizing film, wherein the adhesiveness adjusting layer adjusts an adhesive force of an attachable/detachable layer having an adhesive force of 0.1 gf/25 mm to 500 gf/25 mm.