A display device includes: a display panel including a substrate and a display driving component mounted on the substrate; a backlight unit; and a heat dissipation member present on that surface of the substrate which is opposite to the region in which a display driving component is mounted and on that side of the backlight unit which is opposite to the display panel, the heat dissipation member being made of a highly thermally conductive material and having slits for discharging gas inside the heat dissipation member to outside the heat dissipation member.