A solid-state imaging device of the present invention includes a base 13, a plurality of photoelectric conversion portions 11 formed in a surface of the base 13, and an insulating film 18 formed above the base 13. Openings 18h are formed in the insulating film 18 so that each of the openings 18h is located above each of the photoelectric conversion portions 11. Optical waveguides 19 having a refractive index higher than that of the insulating film 18 are formed in each of the openings 18h. And the optical waveguides 19 are made of a composite material containing a resin 19a and inorganic particles 19b.