Provided is a technique related to a thin display device having a frame structure in which accuracy is ensured. First and second restricting convex portions (84, 85) are formed on the inner parts of a bending hole portion (83). A restricting face (84a) which is an end portion of the first restricting convex portion (84) takes an angle of 45 degrees sloping from upper left to the lower right. A restricting face (85a) which is an end portion of the second restricting convex portion (85) takes an angle of 45 degrees sloping from upper right to lower left. When bending processing is performed, the restricting face (84a) of the first restricting convex portion (84) abuts against the restricting face (85a) of the second restricting projection portion (85).