A photoelectric conversion apparatus, including: a semiconductor substrate having a first surface on which light is incident and a second surface; a photoelectric converting unit configured to convert incident light into charge; a charge holding unit configured to hold charge; a light shielding unit provided in a trench of the semiconductor substrate, the trench being formed between the photoelectric converting unit and the charge holding unit; and a transfer gate formed on a second surface side of the semiconductor substrate so as to overlap with the light shielding unit when viewed in a plan view for the second surface of the semiconductor substrate and configured to transfer the charge at the photoelectric converting unit to the charge holding unit, wherein a distance between the light shielding unit and the photoelectric converting unit is shorter than a distance between the light shielding unit and the charge holding unit.