PROBLEM TO BE SOLVED: To provide a culture solution for spa therapy suitable for treating dermatitis, and a culture solution circulating system for spa therapy capable of keeping the culture solution in a condition suitable for therapy.SOLUTION: In a culture solution circulating system 1, a culture solution for spa therapy, which is obtained by keeping 150 to 180 liters of bath water suspended with 600 g of bacillus powder at 35 to 45°C, and by supplying oxygen whose saturation level is 70% or more to, and fermenting, the bath water for several days, is put into a bathtub and circulated by a circulation part 40 and in a control part 70, the temperature of the culture solution circulated by the circulation part 40 is maintained at 35 to 45°C by heating by a heating part 50, and the oxygen saturation level of the culture solution is raised to 70% or more by an oxygen supply part 60.COPYRIGHT: (C)2015,JPO&INPIT【課題】皮膚炎の治療に適した入浴治療用の培養液とその培養液を治療に適した状態に保つことができる入力治療用の培養液循環装置とを提供する。【解決手段】150~180リットルの浴水に600gのバチルス粉末を懸濁した浴水を35~45℃の温度に保つとともに、酸素飽和度70%以上の酸素供給を行って数日間発酵させて得られた入浴治療用の培養液を浴槽に入れ、循環部40で循環させ、制御部70において、循環部40により循環される培養液の温度を加熱部50により35~45℃に加熱して保持させるとともに、酸素供給部60により培養液の酸素飽和度を70%以上にするようにした入浴治療用の培養液循環装置1。【選択図】図1