[PROBLEMS] To provide an aquatic organism breeding apparatus capable of creating an environment having almost no water flow and a high dissolved oxygen concentration. A growing tank (11) for growing aquatic organisms and a circulating tank (12) for circulating a liquid having a high oxygen concentration are provided. Is characterized in that a gas permeable membrane 3 that does not transmit the gas is provided. [Selection] Figure 1【課題】水流が殆ど無く、溶存酸素濃度の高い環境をつくることができる、水生生物の育成装置を提供すること。【解決手段】水生生物を育成するための育成槽１１と、酸素濃度の高い液体を循環させる循環槽１２と、を備え、育成槽１１と循環槽１２との間に、酸素を透過し、水を透過しない気体透過膜３が設けられたことを特徴としている。【選択図】図１
