There is provided a rib structure formed at a predetermined position inside a cabinet and at positions around a display panel housed in a cabinet, the rib structure including a first rib portion that is substantially linear and one end of which is opposed to a side face of the display panel and a second rib portion that is substantially U-shaped and connected to an other end of the first rib portion at a nearly bottom position of the U-shape and two ends of the U-shape being connected to a wall face of the cabinet.