Provided is a microbubble-generating device capable, when generating microbubbles in a liquid, of appropriately mixing a gas into a liquid ejected from a liquid ejector. The microbubble-generating device comprises a liquid ejector for ejecting a liquid, a gas mixer for pressurizing and mixing a gas into the liquid ejected from the liquid ejector, and a microbubble generator for generating microbubbles in the liquid by passing the liquid with intermixed gas therethrough. Between the liquid ejector and the microbubble generator, the gas mixer pressurizes and mixes the gas into the liquid, which is flowing in a pressurized state toward the microbubble generator.本發明提供一種微細氣泡生成裝置，當使液體中生成微細氣泡時，可使氣體適當地混入從液體排出機排出的液體中。微細氣泡生成裝置具有：液體排出機，排出液體；氣體混入機，對氣體進行加壓而使其混入從液體排出機排出的液體中；以及微細氣泡生成器，使混入有氣體的液體通過內部，藉此來使液體中生成微細氣泡。氣體混入機是在液體排出機與微細氣泡生成器之間，對氣體進行加壓而使其混入在經加壓的狀態下朝向微細氣泡生成器流動的液體中。
