A liquid crystal display device comprising a main body case 3 having opposing side walls 31, 31 and other open portions 32, 32 and a relatively wide U-shaped bottom wall 30, a backlight unit 4 housed in the main body case 3, and an optical member 1 placed on the surfaces of both side walls 31, 31 of the main body case 3 while covering the backlight unit 4, and whose outer periphery is encased by reinforcing frames 6, 7 that are joined at the corners to form a picture frame.