A liquid crystal display device capable of securing the lamp wire to the mold frame is disclosed. The liquid crystal display device includes a liquid crystal display panel for displaying an image, a back light assembly for providing a light to the liquid crystal display panel and a mold frame receiving the liquid crystal display panel and the backlight assembly. The back light assembly includes a light supplying part including a light source for generating a light and a lamp wire for supplying an electrical current to the light supplying part. A securing portion for securing the lamp wire is formed on a side surface or a rear surface of the mold frame, shaped as a groove or a depressed portion, and the lamp wire is secured to the securing portion in such a way that securing and separation of the lamp wire is performed with ease and simplicity. A pair of securing ribs are formed on the bottom of the securing depressed portions facing each other. The lamp wire is secured in the space between a pair of the securing ribs having a width less than a diameter of the lamp wire. Accordingly, a connection failure of the soldering portion of the lamp wire due to a sway of the lamp wire is reduced and the repeated process of securing the lamp wire in manufacturing the LCD device is no longer necessary.