Patent ID: 7023127

Claim:
A multi-point spark plug comprising: a plurality of center electrodes; an insulator for accommodating said center electrodes; a housing for holding said insulator; and earth electrodes located at one end portion of said housing and each disposed in opposed relation each of said center electrodes in a state where a discharging gap is interposed therebetween, wherein said insulator includes a head portion protruding from an end surface of said housing opposite to the side in which said earth electrodes exist, and a plurality of terminals each to be electrically connected to each of said plurality of center electrodes are provided in said head portion, and, in an outside configuration composed of said head portion and said terminals, a contour between a location in which the terminal closest to said housing exists and an end portion remotest from said housing is formed axis-symmetrically with respect to an axis of the head portion.