A laser treatment apparatus that is configured to irradiate a laser beam to an affected area to treat the affected area. The laser treatment apparatus includes: a beam source device that is configured to output a laser beam； and a scanning device that is configured to scan a therapeutic range including the affected area with the laser beam by irradiating the laser beam to the therapeutic range. The scanning device has a transmission medium that is configured to change an output direction of a laser beam according to an applied voltage.
