A display device includes a display panel, a back light module, a printed circuit board and a ground slice. The back light module includes a first frame, a second frame and a light source disposed between the first frame and the second frame. The first frame has a first side plate having an opening, and the second frame has a second side plate opposite to the first side plate. The printed circuit board includes a control circuit electrically connected to the display panel. The printed circuit board is disposed at a side of the back light module, and the control circuit is disposed at the outer side of the first side plate and the second side plate, such that the control circuit is opposite to the second side plate through the opening. The ground slice is connected between the control circuit and the second side plate through the opening.