A display device includes an outer frame, a transparent cover, a back cover, a display module, and a separating structure. The outer frame has a display opening, the transparent cover covers the display opening, and the back cover is opposite to the display opening. The display module is disposed inside the outer frame and has a front surface facing the transparent cover and a rear surface facing the back cover. The separating structure is connected between the back cover and the rear surface of the display module. A first space formed between at least the transparent cover, the front surface of the display module, the outer frame, the back cover, and the separating structure is an enclosed space. A second space formed between at least the rear surface of the display module, the separating structure, and the back cover is connected to an outside and surrounded by the first space.