A laser machining method performing cutting machining to cut a composite material over a thickness direction thereof by applying a laser beam to the composite material. The method includes applying the laser beam from one side in the thickness direction of the composite material so as to form a first cutout in the composite material; and applying the laser beam from the other side in the thickness direction of the composite material, forming a second cutout in the composite material at a position opposing the first cutout, connecting the second cutout to the first cutout, and cutting the composite material. The first cutout is formed by applying the laser beam through a plurality of machining paths arranged in the width direction of the first cutout. The second cutout is formed by applying the laser beam through a plurality of machining paths arranged in the width direction of the second cutout.