A display device includes a display panel including a front substrate and a back substrate, a plurality of brackets attached to a non-display area of a back surface of the back substrate using an adhesive, and a backlight unit positioned in the rear of the display panel. The backlight unit includes a frame including at least one protrusion, a light guide plate disposed between the frame and the display panel, the light guide plate including at least one groove or hole corresponding to the at least one protrusion of the frame, an optical layer disposed between the light guide plate and the display panel, and a light source disposed on the side of the light guide plate.