A display device includes: a display panel curved in a first direction; a lower frame; an upper frame coupled to the lower frame; and a fastening member coupling the lower frame and the upper frame, wherein the lower frame includes a first coupling portion protruding toward the display panel, the first coupling portion having a first coupling hole, the upper frame includes a second coupling portion protruding toward the display panel, the second coupling portion having a second coupling hole, the fastening member penetrates the first coupling hole and the second coupling hole to fasten the lower frame and the upper frame together, and a bottom portion of the first coupling portion forms an acute angle with respect to a base portion of the lower frame, and a bottom portion of the second coupling portion forms an acute angle with respect to a base portion of the upper frame.