A sparkplug having multiple side discharge negative electrodes and employing an integral capacitor extending from the plug body to the area of the connector to the ignition system to effectively store the electrical energy normally lost during the rise time of the ignition transformer, and to discharge the stored energy across the electrode gap. The body (2) has a cylindrical extension which serves as the negative plate (10) of the capacitive element. A positive electrode (8) forms the interior portion of the sparkplug. One end of the positive electrode forms a spark gap (9) with two or more negative electrodes (7). The other end of the positive electrode (8) connects by means of a resistive connector (4) to a conventional high-voltage ignition cable. The positive electrode (8) serves as the positive plate of the capacitive element. A moldable dielectric material (11) completely fills the space between the positive and negative plates (8, 10) of the capacitive element for the length of the sparkplug, and also serves as the outer insulator of the spark plug.