A display device includes a display frame and a display module. The display frame includes multiple side frame pieces, multiple corner frame pieces and a back cover. Each side frame piece has a predetermined length. The multiple corner frame pieces are connected to the multiple side frame pieces, for forming an accommodating space surrounded by the multiple side frame pieces and the multiple corner frame pieces. The back cover is assembled with a side of the multiple side frame pieces and a side of the multiple corner frame pieces, and covers the accommodating space. The display module is disposed inside the accommodating space of the display frame.