Patent ID: 7317370

Claim:
An ignition coil comprising: a coil portion that includes a primary coil, a secondary coil, a center core, and an outer core, the center core being arranged on a radially inner side of both the primary coil and the secondary coil, the outer core being arranged on a radially outer side of both the primary coil and the secondary coil; a fitting member that is in a substantially cylindrical shape, the fitting member having an inner periphery via which the fitting member is fitted to the outer core; and a connector case that includes a connector portion and a flange portion, the connector case having a fit hole via which the connector case is fitted to an outer periphery of the fitting member, wherein the connector case connects with an axial end of the coil portion via the fitting member, the fitting member includes a reinforcement member that is at least partially embedded in the fitting member, the fitting member is formed of thermoplastic resin, and the reinforcement member is formed of a material that is greater in Young's modulus than the thermoplastic resin constructing the fitting member.