According to one embodiment, a display device includes a first substrate, a second substrate, and a liquid crystal layer, wherein the second substrate includes a first light-shielding member in a frame shape having a first opening overlapping an optical sensor, a light-shielding layer having a second opening overlapping the first opening, and a first pixel opening and a second pixel opening, the first light-shielding member has a first outer edge and a second outer edge elongated in a second direction, the first outer edge overlaps the light-shielding layer between the second opening and the first pixel opening in a planar view, and the second outer edge overlaps the light-shielding layer between the second opening and the second pixel opening in a planar view.