Patent ID: 7849843

Claim:
An ignition coil configured to be equipped with a first sparkplug of an engine, the ignition coil comprising: a coil portion including a coil case accommodating a primary coil and a secondary coil, which are coaxial with each other and have a coil axis; and a plug mount portion including a tower portion, which is formed from resin, and a plug cap, which is formed of rubber, wherein the tower portion includes a coupled portion connected with an end of the coil portion, the tower portion further includes a tower cylinder portion projected from the coupled portion and equipped with the plug cap, the plug cap is configured to be press-fitted with the first sparkplug, the coil case has an outer periphery from which a flange portion projects radially outward in a flange-projecting direction, the tower cylinder portion has a tower axis, which is substantially in parallel with the coil axis, the tower axis is offset from the coil axis in a tower-offset direction, the tower-offset direction is substantially the same as the flange-projecting direction, wherein the flange portion is configured to be fixed to a cylinder head cover, which is attached to a cylinder head of the engine, by using a fixing member, when the plug mount portion is located in a first plughole of a cylinder head of the engine and equipped with the first sparkplug, the coil portion is located completely outside of the first plughole, the coil case has one axial end side, an intermediate portion, and an other axial end side in this order in a longitudinal direction of the coil case, and the flange portion projects from the intermediate portion.