The ignition coil includes a cast resin portion; a primary winding embedded in the cast resin portion; a secondary winding embedded in the cast resin portion; at least one contact part electrically connecting an end portion of an ignition cable and a high-voltage end of the secondary winding; a retaining part (4) having a throughgoing aperture for receiving the ignition cable (2), the retaining part (4) protruding from the cast resin portion (14); a shrink hose (3) acting as a sealing means surrounding the end portion of the ignition cable (2) concentrically, extending through the aperture of the retaining part (4) and beyond the retaining part (4); and a shrink sleeve (6) acting as additional sealing means concentric with the end portion of the ignition cable (2) and connected with the end portion of the ignition cable at least in one end region and with the retaining part (4) at least in another end region thereof so as to seal against moisture.