An upper left protruding section 63a, an upper right protruding section 63b, a lower left protruding section 64a, and a lower right protruding section 64b are provided at vertically extending bridge frames 60, and an upper left screw-fixation section 65a, an upper right screw-fixation section 65b, a lower left screw-fixation section 66a, and a lower right screw-fixation section 66b are formed by causing the respective protruding sections to be bent, so that it is possible to cause the vertically extending bridge frames 60 to be screw-fastened directly to a back face of a PDP module 30. Accordingly, it is possible to reduce the number of parts, save the labor of assembling work, reduce the mounting defects, and cut costs.