A liquid crystal display device which includes a liquid crystal display panel, a metal shield casing covering a periphery of the liquid crystal display panel, a plurality of fluorescent lamps arranged below the liquid crystal panel, a back light support supporting the plurality of fluorescent lamps, and a lower casing fixed to the metal shield casing. The back light support is fixed in the lower casing and comprises a plurality of slits, wherein one end of the plurality of fluorescent lamps is disposed with respect to a respective one of the plurality of slits.