A liquid crystal display device includes a liquid crystal display panel on a mold, and a backlight placed in the mold. The backlight includes a light guide panel, an LED provided on a side surface of the liquid guide panel, and other components. A main flexible wiring substrate is attached to the liquid crystal display panel, and extends to a back surface of the mold. The LED is mounted on an LED flexible wiring substrate. At least one electronic component mounted on the main flexible wiring substrate is arranged on an end surface of the mold. Then, an insulating sheet is provided between the at least one electronic component and the LED to prevent short circuit between them, instead of using a partition wall for electrical insulation.