Provided is a curvature variable display device including a panel assembly including a display panel, a back plate disposed on a rear surface of the panel assembly, a first side bracket and a second side bracket respectively coupled to two sides of a rear surface of the back plate, a bending plate having one end rotatably coupled to the first side bracket and another end rotatably coupled to the second side bracket and having a convex curvature toward a rear of the back plate, a stand post having an upper end coupled to a center area of the bending plate and a lower end coupled to a stand base, and a dial assembly provided on the stand base to wind or unwind a wire coupled to the rear surface of the back plate and change curvatures of the panel assembly and the back plate.