A distance measurement device according to one aspect of the present invention includes a photoelectric conversion device which includes a light receiving unit, a charge storage unit, a charge discharge unit, and a gate electrode, a controller which controls an irradiation timing of pulse light having a pulse width which is sufficiently shorter than response time of the light receiving unit to an object and performs control to generate control pulse voltages having at least two kinds of phases based on the irradiation timing and to apply it to the gate electrode, a charge reading unit which reads a first and second charges stored in the charge storage unit according to the applications of the respective control pulse voltages having two kinds of phases as a first and second electrical signals, and a calculation unit which calculates a distance to the object based on the first and second electrical signals.