Abstract: In an internal combustion engine ignition distributor, an ignition spark energy conductive circuit arranged for connection to the secondary winding of an ignition coil is so formed and positioned that it is substantially equally radially spaced from each of the distributor output circuits and an annular insulating rib rotated with the rotor is disposed within the space between the ignition spark energy conductive circuit and the distributor output circuits. The annular insulating rib supports and locates radial circumferentially spaced juxtaposed conductive inserts in spark gap relationship with both the ignition spark energy conductive circuit and successive ones of the distributor output circuits upon the rotation thereof.