Liquid crystal display device

A liquid crystal display device provided with a liquid crystal display panel having a pair of transparent substrates disposed to face with each other via a liquid crystal layer, and a backlight unit disposed on a back surface of the liquid crystal display panel for radiating a backlight ray,

• wherein the backlight unit includes a light guide plate, a light source opposite a side surface of the light guide plate, a plurality of optical sheets disposed on a main surface of the light guide plate, and a mold member which surrounds outer peripheries of the light guide plate and the optical sheets;
• at least one of the pair of transparent substrates has a first side wall surface;
• the mold member has a second side wall surface;
• a plate member is disposed opposite the first side wall surface and the second side wall surface;
• and
• the plate member is fixed to the first side wall surface and the second side wall surface.