Disclosed is a liquid crystal display device of which overall size and weight can be minimized. The liquid crystal display device has a light generating unit for generating a light. A light guiding plate guides the light to a display unit for displaying an image. A reflection plate is disposed under the light guiding plate for reflecting the light to the light guiding plate. A receiving container receives the reflection plate, the light guiding plate and the light generating unit. At least one boss is formed on a bottom of the receiving container for preventing the light generating unit from being moved by guiding a position of the light generating unit. Accordingly, the number of the parts installed in the liquid crystal display device can be reduced, and the manufacturing cost can be decreased because the manufacturing process is simplified in comparison with the liquid crystal display device including a separate lamp cover.