Provided is a liquid crystal display device. The liquid crystal display device includes: a liquid crystal display panel; a light source under the liquid crystal display panel; a light guiding plate; a reflecting plate; a guide mold; and a supporting member. The light guiding plate is in contact with one surface of the light source. The reflecting plate is disposed under the light guiding plate. The guide mold accommodates the light source, the light guiding plate, and the reflecting plate therein. The supporting member is disposed under the reflecting plate and supports at least a part of one surface of the reflecting plate.