To form a sacrificial anode to steel structures with various shapes by a simple method.

In a corrosion prevention structure for a steel structure (1) where a part is buried into a base (2), a hollow material (10) for corrosion prevention composed of an aluminum alloy comprising 2 to 20 mass% Zn, and in which the concentration of Cu is regulated to 0.1 mass%, and the balance Al with impurities is wound around the outer circumferential face of the verge part directly on the buried part in the steel structure (1), and further, the hollow material (10) for corrosion prevention and the steel structure (1) make conductive.