There is provided a photoelectric conversion device in which a distance from a main surface to an inner surface of a first part of a dielectric film is smaller than a distance from the main surface to a top surface of a light shielding member, a distance from the main surface to an outer surface of the first part is smaller than a distance from the main surface to an outer surface of a second part of the dielectric film, an outer surface of a third part inclines to the top surface, a surface of a dielectric member inclines to the top surface, between the dielectric film and the top surface in a normal direction, and the dielectric member has a refractive index lower than a refractive index of the dielectric film.