A first photodetector according to an embodiment of the present disclosure includes: a substrate having a first surface that serves as a light-receiving surface and a second surface opposed to the first surface, and including an uneven structure provided on the first surface and a light-receiving section that performs photoelectric conversion to generate electric charge corresponding to an amount of light reception for each pixel; a passivation film stacked on the first surface of the substrate; and a reflectance adjustment layer including a plurality of protrusions configuring the uneven structure and the passivation film embedded in a plurality of recesses configuring the uneven structure, and having a refractive index between the substrate and the passivation film.