Abstract: The present invention provides a novel metal-vapor pulsed laser capable of being manufactured without using a large-sized laser tube or an expensive discharging circuit. The output and the efficiency of the laser can be improved economically and easily. The laser includes a laser tube having a cathode and an anode. A discharging circuit induces an electric discharge in the laser tube. A grid electrode is mounted close to the cathode of the laser tube. A preliminary discharge is produced between the grid electrode and the cathode to thereby induce a main discharge.