The present technology relates to a solid-state imaging apparatus and an electronic device that are configured to enhance the accuracy in the detection of polarization information. The solid-state imaging apparatus has a pixel array block on which pixels each including a photoelectric conversion device are arranged; a polarizer, including a conductive light-shielding material, that covers a photosensitive surface of the above-mentioned photoelectric conversion device of at least part of the above-mentioned pixels; a light-shielding film, including a conductive light-shielding material, that is arranged between the above-mentioned adjacent pixels on the photosensitive surface side of the above-mentioned photoelectric conversion device; and a wiring layer arranged on a side opposite to the photosensitive surface of the above-mentioned photoelectric conversion device, in which the above-mentioned polarizer is connected to a wiring of the above-mentioned wiring layer via the above-mentioned light-shielding film. The present technology is applicable to solid-state imaging apparatuses, for example.