A liquid crystal display (LCD) device employs a lower polarization plate structure thinner than conventional devices. The device comprises: a LCD panel including first and second substrates, and liquid crystal between the first and second substrates; and a backlight on the first substrate side of the panel. The backlight includes a frame-like mold frame and an optical sheet inside the mold frame. The LCD panel is adhered to the mold frame by double-sided tape, and includes a lower polarization plate on the first substrate's surface. The double-sided tape is adhered to a peripheral portion of the first substrate on one side, and to the mold frame and a peripheral portion of the optical sheet on the other. Where A is the thickness of the double-sided tape and B the thickness of the lower polarization plate, A>B. The difference A−B satisfies 0