PURPOSE: To permit the sure protection of a structure from lightning stroke by a method wherein a lightning arrester is provided with a lightning receiving unit, provided above the apex of the structure provided in the outside of a building and formed with a length along the whole length of the structure substantially, and a conductor, grounding a lightning current generated in the lightning receiving unit in accompanied by lightning stroke.

CONSTITUTION: The base of a lightning receiving unit 1, formed by bending a rod member having a quality based on a predetermined specification so as to have an L-shape, is connected mechanically and electrically to the tip end of a pole, used both for a conductor 3, through a fixing hardware 7. Accordingly, the lightning receiving unit 1 catches lightenings from a multitude of directions to protect a structure 2 from lightning stroke. When lightning has deviated from the lightning receiving unit 1 and has arrived directly at a lamp body 5, a metallic body in the lamp body 5 catches the lightning and grounds a lightning current of the same through the conductor 3. According to this method, the structure 2 can be protected surely from the lightning stroke.