Provided is a display device including: a display panel; a chip on film (COF) coupled to the display panel; a flexible printed circuit board (FPCB) coupled to the chip on film, the flexible printed circuit board including a plurality of conductive layers and a plurality of insulating layers, the insulating layers being interposed between the conductive layers or being located at opposite sides of the flexible printed circuit board; and a protecting sheet at one side of the display panel and including a conductive region. One of the insulating layers at one side of the flexible printed circuit board is an opening region of the one of the insulating layers and exposes a corresponding one of the conductive layers to at least partially contact the conductive region.