PURPOSE: A lightning protection and method for a firing body are provided to concentrate the shielding range on a core element by forming arrestor in a triangular shape. CONSTITUTION: Three arrestors(20) are arranged around a core element(10) in a triangular shape. The shielding area(30) of the arrestors is overlapped on the core element. When there is lighting, one of arrestors absorbs the light to protect the core element from the lighting. A lighting counter counters the number of the lighting.
