主权项 |
1. A spark plug, comprising:
a center electrode; and a ground electrode disposed providing a gap with the center electrode, wherein at least one of the center electrode and the ground electrode includes a tip forming the gap, and the tip has a main constituent of Ir and contains Rh of 7 mass % or more to 31 mass % or less, Ru of 5 mass % or more to 20 mass % or less, and Pt of one-twentieth or more to one-half or less of a Ru content. |