A display device includes a display module, a sandwich honeycomb panel coupled to a rear of the display module, the sandwich honeycomb panel including a front thin plate located at the display module side, a rear thin plate opposing the front thin plate, and a honeycomb structure disposed between the front thin plate and the rear thin plate, the honeycomb structure including a plurality of hexagonal unit cells. A fastener including a fastener body, the fastener being inserted into the sandwich honeycomb panel such that a surface of the fastener is exposed from a rear of the sandwich honeycomb panel.