A voltage determination device comprising: a printed wiring board on which a first substrate terminal to which a first voltage is input from an outside, a second substrate terminal to which a second voltage is input from the outside, and a third substrate terminal to which a third voltage is input from the outside are arranged in substantially one line; a first voltage determination circuit mounted on a first surface of the printed wiring board and configured to determine a voltage difference between the first voltage and the second voltage, the first voltage determination circuit being disposed on a first side of the printed wiring board divided by a first arrangement line passing through the first to third substrate terminals; a second voltage determination circuit mounted on the first surface of the printed wiring board and configured to determine a voltage difference between the third voltage and the second voltage, the second voltage determination circuit being disposed on the first side of the printed wiring board divided by the first arrangement line; characterised by a first printed wiring connecting the first substrate terminal and the first voltage determination circuit to each other; a second printed wiring connecting the second substrate terminal and the first voltage determination circuit to each other; a third printed wiring connecting the third substrate terminal and the second voltage determination circuit to each other; and a fourth printed wiring connecting the second substrate terminal and the second voltage determination circuit to each other, wherein the first to fourth printed wirings (S 1-S4) are provided without intersecting each other and without bypassing a second side of the printed wiring board divided by the first arrangement line, wherein the first voltage determination circuit includes a first high voltage side input terminal connected to the first substrate terminal through the first printed wiring and a first low voltage side input terminal connected to the second substrate terminal through the second printed wiring, the second voltage determination circuit includes a second high voltage side input terminal connected to the third substrate terminal through the third printed wiring and a second low voltage side input terminal connected to the second substrate terminal through the fourth printed wiring, and the first voltage determination circuit and the second voltage determination circuit are disposed so that the first low voltage side input terminal and the second low voltage side input terminal are adjacent to each other. a printed wiring board on which a first substrate terminal to which a first voltage is input from an outside, a second substrate terminal to which a second voltage is input from the outside, and a third substrate terminal to which a third voltage is input from the outside are arranged in substantially one line; a first voltage determination circuit mounted on a first surface of the printed wiring board and configured to determine a voltage difference between the first voltage and the second voltage, the first voltage determination circuit being disposed on a first side of the printed wiring board divided by a first arrangement line passing through the first to third substrate terminals; a second voltage determination circuit mounted on the first surface of the printed wiring board and configured to determine a voltage difference between the third voltage and the second voltage, the second voltage determination circuit being disposed on the first side of the printed wiring board divided by the first arrangement line; characterised by a first printed wiring connecting the first substrate terminal and the first voltage determination circuit to each other; a second printed wiring connecting the second substrate terminal and the first voltage determination circuit to each other; a third printed wiring connecting the third substrate terminal and the second voltage determination circuit to each other; and a fourth printed wiring connecting the second substrate terminal and the second voltage determination circuit to each other, a first printed wiring connecting the first substrate terminal and the first voltage determination circuit to each other; a second printed wiring connecting the second substrate terminal and the first voltage determination circuit to each other; a third printed wiring connecting the third substrate terminal and the second voltage determination circuit to each other; and a fourth printed wiring connecting the second substrate terminal and the second voltage determination circuit to each other, wherein the first to fourth printed wirings (S 1-S4) are provided without intersecting each other and without bypassing a second side of the printed wiring board divided by the first arrangement line, wherein the first voltage determination circuit includes a first high voltage side input terminal connected to the first substrate terminal through the first printed wiring and a first low voltage side input terminal connected to the second substrate terminal through the second printed wiring, the second voltage determination circuit includes a second high voltage side input terminal connected to the third substrate terminal through the third printed wiring and a second low voltage side input terminal connected to the second substrate terminal through the fourth printed wiring, and the first voltage determination circuit and the second voltage determination circuit are disposed so that the first low voltage side input terminal and the second low voltage side input terminal are adjacent to each other.