Abstract: It is an object to collect objective and quantitative experimental data, etc. and clarify, based on abundant examples that a microbubble generating device is useful for health promotion, and based on this clarification provide a health promoting apparatus. A mechanical bathing apparatus as a health promoting device includes a bathtub 10 as a water tank 1, forty microbubble generating devices 2 arranged on the bottom surface 11 of the bathtub 10, a pump P for sucking hot water or the like in the bathtub 10 via a water suction pipe 3 and circulating and supplying pressurized water to the MB devices 2 via a discharge pipe 4, and an air header 5 for supplying air to the each MB device 2.