PROBLEM TO BE SOLVED: To provide an underwater aquaculture device of salmon in which water surface activities of fish for taking air in an air bladder can be guided even when a farming tank is in the underwater for underwater aquaculture of salmon and trout finishing a seawater conditioning process.SOLUTION: An underwater aquaculture device 100 of salmon by the present invention may comprise: an upper rim 110 formed so as to have buoyancy in water； a lower rim 120 disposed in a lower part of the upper rim 110； a net 140 fixed to the upper rim 110 and the lower rim 120 and formed so as to have a three-dimensional space； an air storage 150 provided in a lower part of an upper surface 141 of the net 140 and formed so as to store air for performing water surface activities for the fish to take air in the air bladder； and an intermediate frame 170 provided in the upper surface 141 of the net 140, and supporting the air storage 150 so as to maintain a shape and a position of the air storage 150 to a tidal current and wind waves.SELECTED DRAWING: Figure 1【課題】海水馴致過程を終えたサケやマスの水中養殖のために、蓄養槽が水中にあるときも浮袋に空気を取り込むための魚の水面活動を誘導できるサケ類の水中養殖装置を提供する。【解決手段】本発明によるサケ類の水中養殖装置１００は、水中で浮力を有するように形成された上部リム１１０と、上部リム１１０の下方に配置される下部リム１２０と、上部リム１１０と下部リム１２０とに固定されて立体空間を有するように形成された網１４０と、網１４０の上面１４１の下部に設けられ、魚が浮袋に空気を取り込むための水面活動を行えるように、空気が溜まるように形成された空気貯蔵部１５０と、網１４０の上面１４１に設けられ、潮流や風浪に対して空気貯蔵部１５０の形状や位置を維持できるように空気貯蔵部１５０を支持する中間フレーム１７０とを含むようにしてもよい。【選択図】図１
