PROBLEM TO BE SOLVED: To provide a marine product cultivating method capable of efficiently cultivating seaweed, shellfish, etc. and substantially reducing labor and energy required for collecting them.SOLUTION: A marine product cultivating apparatus 1 has an annular rope 2 having a marine product holding part 3 and a rotation part 41 that rotates while contacting the annular rope 2, and includes a plurality of direction-changing devices 4A and 4B for changing the direction of movement of the annular rope 2. At least one of the direction-changing devices 4A and 4B includes rotation part driving means for rotating the rotation part 41 and advancing the marine product holding part 3.【課題】海藻や貝類等を効率よく養殖することできるとともに、収穫に要する労力やエネルギーを大幅に削減することができる水産物の養殖方法を提供すること。【解決手段】本発明の水産物の養殖装置１は、水産物保持部３を有する環状索２と、該環状索２と接触しつつ回転する回転部４１を有し、該環状索２２の移動方向を変更する複数の方向転換装置４Ａ，４Ｂとを備え、少なくとも一つの方向転換装置４Ａ，４Ｂが、回転部４１を回転させて水産物保持部３を進行させる回転部駆動手段を備える。【選択図】図１
