A photoelectric conversion device of the present disclosure includes: a scanning unit; a first storage unit that stores a first setting value representing a setting of a first scan in response to an input from the outside; and a second storage unit that stores a second setting value representing a setting of a second scan in response to an input from the outside, wherein the scanning unit performs the first scan based on the first setting value and the second scan based on the second setting value in one frame period, and wherein both storing of the first setting value in the first storage unit and storing of the second setting value by the second storage unit are performed prior to a start of the first scan and a start of the second scan.