Patent ID: 8499751

Claim:
An internal combustion engine ignition coil device comprising: a primary coil to which a primary current is applied; a secondary coil that is magnetically coupled with the primary coil and generates an ignition voltage when the primary current is cut off, so as to produce a spark discharge between a pair of electrodes of an ignition plug; a noise suppression element that is electrically connected between the secondary coil and one of the pair of electrodes of the ignition plug; and a case that is made of an insulating material and has a noise suppression element containing unit that contains the noise suppression element, wherein there are provided a rib that is included in the noise suppression element containing unit and is disposed in such a way as to face the outer circumferential surface of the noise suppression element and a resin insulating material that is filled into the noise suppression element containing unit and makes contact with the rib and the noise suppression element.