Abstract: An ignition plug for an internal combustion engine including: a main cell having a groove; an auxiliary cell which is formed on the outer circumferential surface of the main cell in a ring shape, surrounds the main cell and has a screw part formed on the outer face of the lower portion, the auxiliary cell having a bending part of which the upper portion is bent in the direction of the main cell and caught to the groove; a ring cover fit in the bending part; a first combustion chamber formed inside the lower portion of the auxiliary cell and in which an electrode for generating flames is accommodated; and an orifice valve combined to an end portion of the auxiliary cell to surround the electrode, the orifice valve having a protruding in the inward direction of the auxiliary cell and having at least one jet hole.