PROBLEM TO BE SOLVED: To provide a microbubble generator which generates microbubbles by outdoor air introduction and spontaneous cavitation effect even under such conditions as to hardly secure sufficient pressure as well as water.SOLUTION: There is provided a microbubble generator capable of generating microbubbles by outdoor air introduction and spontaneous cavitation effect to float an object to be cleaned on a water surface by using a cleaning effect accompanied with microbubble generation or a physiologically active function in human body. The generation of microbubbles has a beneficial effect on health since a burst impact at break of microbubbles exerts a favorable effect on improvement of blood circulation.【課題】十分な圧力と水量が確保できにくい状況下であっても、外気導入と自発的キャビテーション効果によって微細泡を発生させるマイクロバブル発生装置を提供する。【解決手段】微細気泡発生に伴う洗浄効果、あるいは人体における生理活性作用を利用し、外気導入と自発的キャビテーション効果によって微細泡を発生させ洗浄すべき対象物を水面に分離浮上することが出来る技術で、健康面に用いれば、微細泡の破裂時のバーストインパクトにより血行の改善等に効果を持つマイクロバブル発生装置。【選択図】図６
