Disclosed herein is a laser beam processing machine having a chuck table for holding a workpiece, a laser beam applicator for applying a laser beam capable of passing through the workpiece to the workpiece held on the chuck table, and a processing-feeder for moving the chuck table and the laser beam applicator relative to each other, the laser beam applicator having a laser beam oscillator, an optical transmitter for transmitting a laser beam oscillated from the laser beam oscillator and a condenser lens for converging a laser beam transmitted by the optical, transmitter. The optical transmitter includes a birefringence lens for separating the laser beam oscillated from the laser beam oscillator into normal light and abnormal light; and the condenser lens converges respectively the normal light and the abnormal light separated by the birefringence lens to form the focal point of the normal light and the focal point of the abnormal light.