<；P>；PROBLEM TO BE SOLVED: To provide a bathtub apparatus capable of saving energy and giving favorable effects on a human body by increasing the blood flow. <；P>；SOLUTION: This bathtub apparatus is provided with a nanobubble generation part 2, a bathtub part 3, a hot water storage tank unit 27 and a heat pump unit 28. The nanobubble generation part 2 shears and crushes microbubbles in water to generate nanobubbles and creates nanobubble-containing water containing the nanobubbles. The hot water storage tank unit 27 is annularly connected to the nanobubble generation part 2. The heat pump unit 28 is connected to the hot water storage tank unit 27. The bathtub part 3 is supplied with the nanobubble-containing water which circulates between the nanobubble generation part 2 and the hot water storage tank unit 27 and is heated by the heat pump unit 28. <；P>；COPYRIGHT: (C)2008,JPO&INPIT
