Solid-state imaging device

A solid-state imaging device comprising

• unit pixels arrayed two-dimensionally in a pixel area of a substrate,
• the unit pixels including, in one-to-one correspondence:
• photoelectric converters;
• and
• collecting elements which collect incident light, the collecting elements including:
• a first collecting element having a convex surface, the first collecting element being formed in a unit pixel disposed in a central region of the pixel area among the unit pixels;
• and
• a second collecting element having a convex surface and grooves having widths less than or equal to a wavelength of the incident light, the second collecting element being formed in a unit pixel disposed in a region of the pixel area not including the central region, among the unit pixels, wherein
• the second collecting element has, in plan view of the substrate:
• a sparse region;
• and a dense region in which a density of formations of the grooves is higher than the density of formations of the grooves in the sparse region, and
• the sparse region of the second collecting element is positioned closer to the central region of the pixel area than the dense region of the second collecting element is.