A stereo camera calibration method includes: obtaining a stereo image generated by imaging a chart using a stereo camera, the chart at least including two markers arranged at a known interval; measuring the known interval, using the stereo image and a calibration parameter for the stereo camera; and correcting a parameter pertaining to an optical axis position so as to reduce a difference between the known interval and a result of the measurement. The correcting includes performing a process corresponding to moving the optical axis position in perpendicular and lateral directions on an imaging surface of the stereo camera. The correcting includes calculating a perpendicular correction amount of the optical axis position, and then calculating a lateral correction amount of the optical axis position.