A photoelectric conversion device includes a pixel array in which a plurality of pixels including a photoelectric conversion unit are arrayed, a first storage unit and second storage unit which store pixel signals read out from the pixel array, a first read switch which reads out the pixel signal stored in the first storage unit to a first common signal line, a second read switch which reads out the pixel signal stored in the second storage unit to a second common signal line, and a third read switch which has an input terminal electrically connected to the output terminal of the second storage unit, and an output terminal electrically connected to the output terminal of the first read switch, and reads out the pixel signal stored in the second storage unit to the first common signal line.