A liquid crystal display device includes: a first substrate including an upper surface, a lower surface, and at least one lateral surface; a first polarization layer provided on the upper side of the first substrate; a light source provided on the at least one lateral side of the first substrate; a second substrate including an upper surface and a lower surface; a thin film transistor provided on the lower surface of the second substrate; a pixel electrode electrically connected to the thin film transistor; and a liquid crystal layer provided between the first substrate and the second substrate.