Ignition coil for use in engine and engine having plastic cylinder head cover

An individual ignition type ignition coil for use in an engine in which a center core, a secondary coil wound on a secondary bobbin and a primary coil wound on a primary bobbin are installed concentrically from an inner side of a coil case in order, and said ignition coil is connected directly to a respective spark plug of said engine, the ignition coil for use in the engine wherein an insulation resin is filled up between said secondary bobbin and said center core; and said insulation resin is an insulation resin having a glass transition point Tg which satisfies a condition of an allowable stress of said secondary bobbin greater than a generation stress from -40°C to a glass transition point Tg of said insulation resin.