PROBLEM TO BE SOLVED: To enable a hot and cold alternate bath without a bather moving, by automatically and alternately adjusting a predetermined hot water temperature and a cold water temperature by a compact simple device, unlike a complicated and time-consuming method. A hot/cold alternating bath device is provided. SOLUTION: A hot water/cool water tank 100 is provided on one side with a hot water feeder 200 for sucking cold water from the hot/cold water tank to make hot water having a predetermined temperature and supplying the hot water/cool water tank to the other side. A cold water supplier 300 for sucking hot water from the water tank to make it cold water having a predetermined temperature and supplying the cold water to the hot water/cool water tank is provided. [Selection diagram] Figure 1【課題】煩雑で手間のかかる方法とは異なり、コンパクトな簡単装置により自動的に所定の温水温度及び冷水温度に交互に調整して、浴人が動かずして温冷交代浴を可能にした温冷交代浴装置を提供する。【解決手段】温水兼冷水槽１００の一側に温水兼冷水槽からの冷水を吸引して所定温度の温水にして温水兼冷水槽に供給する温水供給器２００を設け、他側に温水兼冷水槽からの温水を吸引して所定温度の冷水にして温水兼冷水槽に冷水を供給する冷水供給器３００を設けた。【選択図】図１
