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. <EOS>