is employed in a tenth embodiment of the invention in this embodiment there is employed a high tension distribution system using a distributor 14 and a secondary winding 1b which is adapted to generate a high voltage for ignition a discharge current is allowed to flow along a path which includes a secondary winding 1b a capacitor 7 a diode 10 ground an ignition plug 3 a plurality of peripheral electrodes 14b of the distributor 14 an air gap a central electrode 14a of the distributor 14 and the secondary winding 1b the effects of the embodiment 10 are similar to those of the embodiment 9 fig1 shows a circuit diagram which is employed in an eleventh embodiment of the invention in this figure reference numerals 23 and 24 respectively correspond to a resistor and a high tension diode which are connected in parallel between the ignition high voltage generation end of a secondary winding 1b and an ignition plug 3 the high tension diode is connected between the output terminal of the secondary winding 1b opposite to the ignition high voltage generation end thereof and the ignition plug 3 other reference characters stand for the same parts as shown in the previously described embodiments in the above mentioned structure when the ignition coil 1 is on a current is allowed to flow in such a manner as shown by arrows in fig1 a and voltages are caused to drop at the two ends of the resistor 23 whereby.