To provide raising means for promoting breeding of coral or growth of a coral colony, and expanding a raising range of coral.SOLUTION: There is provided a coral raising structure A for raising coral C on a net-like member 2 which is an almost planar state and which is fixed by being connected to each pole 1 erected from an installation surface S of a sea bottom, in which the net-like member 2 can be fixed to any of a position at a height h2 which is elevated relative to the installation surface S, and a position at a height h1 in the vicinity of the installation surface S, in the coral raising structure A. After raising the coral C for a constant period, in a state in which the coral C is fixed, the net-like member 2 is slid (symbol X) to the height h1 in the vicinity of the installation surface S of the sea bottom W2, for fixing again, for continuing raising of the coral, thereby promoting breeding of coral or growth of a coral colony and expanding a raising range of coral.SELECTED DRAWING: Figure 1【課題】サンゴの増殖又はサンゴ群体の成長を促進し、その生育範囲を拡大する育成手段を提供する。【解決手段】海底の設置面Ｓから立設された各支柱１に連結することで固定された略平面状の網状部材２上でサンゴＣを育成するサンゴ育成用構造物Ａであって、設置面Ｓよりも嵩上げされた高さｈ２、及び、設置面Ｓ近傍の高さｈ１、のいずれの位置にも、網状部材２を固定できるサンゴ育成用構造物Ａを提供する。サンゴＣを一定期間育成した後、サンゴＣが定着した状態のまま、網状部材２を海底Ｗ２の設置面Ｓ近傍の高さｈ１にスライドさせて（符号Ｘ）再固定し、サンゴの育成を継続することにより、サンゴの増殖又はサンゴ群体の成長を促進でき、その生育範囲を拡大できる。【選択図】図１
