Provided is a curvature variable display device including a back plate provided on a rear surface of a 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 rotatably coupled to the first side bracket and the second side bracket, a stand post coupled to the bending plate and the stand base, a wire moving member built into the stand post to move the wire by driving a motor and change the curvature of the panel assembly and the back plate.