A substrate has a first surface and a second surface facing each other. A photoelectric conversion region includes a plurality of photoelectric conversion devices provided in the substrate. An interlayered insulating layer is provided on the first surface of the substrate. A plurality of wires is provided on the interlayered insulating layer. An inter-wire insulating layer covers the plurality of wires. A plurality of micro lenses is provided on the second surface of the substrate. A grid pattern is provided in at least one of the interlayered insulating layer and the inter-wire insulating layer. The grid pattern, when viewed in a plan view, overlaps a region between two adjacent photoelectric conversion devices of the plurality of photoelectric conversion devices.