In order to match the focal positions of laser beams having different wavelength bands, a laser machining device is provided with: a laser output device that emits lasers having a plurality of wavelength bands; a dispersion unit (16B) that disperses each of the laser beams having different wavelength bands; and an optical condenser (16C, 16C) that independently condenses each of the laser beams that is dispersed by the dispersion unit (16B) and combines the focal points thereof at the same position.
