An image display device comprising: a light source unit configured to output a light beam; a light source driving unit configured to drive the light source unit based on input image data; a scanning mirror configured to scan the light beam by reflecting the light beam at an angle according to a drive voltage; a driving coil that is provided on a back surface of a reflecting surface of the scanning mirror and configured to change an orientation of the reflecting surface according to the drive voltage; a magnet configured to generate a magnetic field around the driving coil, an angle obtaining unit configured to obtain a static angle, the static angle being an angle of a central axis of a reflection surface of the scanning mirror with respect to a mechanical central axis of the scanning mirror when the drive voltage is not applied, and a bias application unit configured to apply a bias voltage to the scanning mirror based on the static angle obtained by the angle obtaining unit, the bias voltage correcting a deviation of the central axis of the reflecting surface of the scanning mirror from a designed position, and the deviation being generated due to a configuration of the scanning mirror and gravity, wherein the angle obtaining unit includes a Hall element that is provided on the back surface of the reflecting surface of the scanning mirror and configured to detect a magnetic field intensity of the magnet and is configured to obtain the static angle based on the magnetic field intensity detected by the Hall element, and wherein the bias application unit is configured to calculate the bias voltage based on a predetermined coefficient and the magnitude of the static angle and to add the bias voltage to the drive voltage. a light source unit configured to output a light beam; a light source driving unit configured to drive the light source unit based on input image data; a scanning mirror configured to scan the light beam by reflecting the light beam at an angle according to a drive voltage; a driving coil that is provided on a back surface of a reflecting surface of the scanning mirror and configured to change an orientation of the reflecting surface according to the drive voltage; a magnet configured to generate a magnetic field around the driving coil, an angle obtaining unit configured to obtain a static angle, the static angle being an angle of a central axis of a reflection surface of the scanning mirror with respect to a mechanical central axis of the scanning mirror when the drive voltage is not applied, and a bias application unit configured to apply a bias voltage to the scanning mirror based on the static angle obtained by the angle obtaining unit, the bias voltage correcting a deviation of the central axis of the reflecting surface of the scanning mirror from a designed position, and the deviation being generated due to a configuration of the scanning mirror and gravity, wherein the angle obtaining unit includes a Hall element that is provided on the back surface of the reflecting surface of the scanning mirror and configured to detect a magnetic field intensity of the magnet and is configured to obtain the static angle based on the magnetic field intensity detected by the Hall element, and wherein the bias application unit is configured to calculate the bias voltage based on a predetermined coefficient and the magnitude of the static angle and to add the bias voltage to the drive voltage.