PROBLEM TO BE SOLVED: To provide a coral adhering structure for improving the probability of survival of a coral.SOLUTION: A coral adhering structure (1, 10B, 700, 800) comprises: a substrate (10, 10A, 101) a tabular extension part (20, 20A, 201) extending obliquely from the substrate and a folding-back part (30, 301) formed at the end part of the extension part toward the inner side. According to the structure of the invention, the probability of survival of an aquatic life such as a coral is improved.