A laser eye surgery apparatus includes: a laser light source configured to emit pulsed laser light a scanner configured to scan the pulsed laser light emitted from the laser light source a condenser configured to concentrate the pulsed laser light scanned by the scanner in a tissue of a patients eye and a plane-parallel plate which is provided in a region in which the pulsed laser light is converged or diverged on an optical path of the pulsed laser light from the laser light source to the patients eye. The plane-parallel plate has a light incident plane to which the pulsed laser light is incident, and a light-emitting plane emitting the pulsed laser light incident from the light incident plane, and the light incident plane and the light-emitting plane are parallel to each other, or are the same plane.
