This left-right blood pressure difference calculation device 30 is provided with a measurement result acquisition unit 321 which acquires from a measurement device 10 measurement results of the right-side blood pressure and the left-side blood pressure of the driver of a vehicle 1, a vehicle information acquisition unit 322 which acquires vehicle information indicating the vehicle state at the time of measurement of the right-side blood pressure and the left-side blood pressure, and a calculation unit 324 which, on the basis of the right-side blood pressure and the left-side blood pressure measured in a prescribed vehicle state, calculates the left-right blood pressure difference, which is the difference between the right-side blood pressure and the left-side blood pressure.
