PROBLEM TO BE SOLVED: To provide a device for generating high-concentration carbonated bath capable of generating high-concentration carbonated bath steadily in a short time even with existing hot water in a bathtub.SOLUTION: Both ends of a circulation flow path formation pipeline including a circulation pump are immersed in hot water or water in a bathtub so that the hot water or water in the bathtub can be circulated through the circulation flow path formation pipeline and the bathtub. A carbon dioxide gas supply unit for supplying carbon dioxide gas is connected in the circulation flow path formation pipeline at a location downstream of a circulation pump. A fluid mixer for forming gas-liquid mixed fluid by micronizing carbon dioxide gas to a particle diameter including less than 1 μm to be mixed with hot water or water uniformly is disposed downstream of the carbon dioxide gas supply part and the gas-liquid mixed fluid is circulated through the fluid mixer, thereby generating high-concentration carbonated bath.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】既存の浴槽湯においても、短時間にかつ堅実に高濃度炭酸泉を生成することができる高濃度炭酸泉生成装置を提供すること。【解決手段】浴槽内の湯ないしは水中に、循環ポンプを設けた循環流路形成配管の両側端部を浸漬することで、循環流路形成配管と浴槽内を通して浴槽内の湯ないしは水を循環ポンプにより循環可能とし、循環流路形成配管には、炭酸ガスを供給する炭酸ガス供給部を、循環ポンプの下流側に位置させて接続し、かつ、1μm未満を含む粒径まで炭酸ガスを微細化するとともに、湯ないしは水と均一に混合して気液混合流体となす流体混合器を、炭酸ガス供給部の下流側に配設して、流体混合器中を通して気液混合流体を循環させることで高濃度炭酸泉を生成可能とした。【選択図】図1