PURPOSE: To enable to repetitively operate a laser device and to inexpensively select and use a material which can readily selects the resistance value and which is readily treated by connecting a condenser directly to discharging electrodes so that the electrodes have higher than 0.05Ωcm of resistivity and non- inductive property.

CONSTITUTION: A condenser 13 in a laser tube enclosure 11 is connected directly to a discharging electrode 12 or a discharging electrode holding material 19. The electrode 12 is selected for the resistivity of the component materials to a value higher than 0.05Ωcm, and is constructed in the shape becoming non-conductive of the using frequency. The pulse current is limited unitl the resistivity of the electrode 12 is up to 0.05Ωcm, and the sharpness of the waveform does not become obtuse. The electrode material may include, in addition to carbon, nichrome alloy, silicon, tantalum. The shape of the electrode may formed in the shape to set the self-inductance to zero to the current which flows through the main discharging gap.