Abstract: A pulse generator is composed of switch means to switch supply of a first current through a circuit, a first condenser connected to the switch means in series and primary charged by the first current, voltage raising means having a primary winding serially connected to the first condenser and a secondary winding to obtain voltage output by the first current, magnetic switch means of current flow switchable having a primary winding serially connected to the secondary winding of the voltage raising means and a secondary winding, a second condenser connected to the secondary winding of the magnetic switch means and charged by the output therefrom, and discharging means connected to the second condenser to generate pulse discharge when charged voltage of the second condenser is applied thereto by switching the magnetic switch means.