PROBLEM TO BE SOLVED: To provide a fine bubble formation device having a cylindrical basic structure where problems that a conventional fine bubble formation device cannot supply a large amount of fine bubbles and cannot cope with lifting, transporting and various kinds of liquids are solved, which copes with various kinds of liquids and generates the large amount of fine bubbles and where fine bubble-containing water can be lifted and transported.SOLUTION: A fine bubble formation device comprises: a liquid introduction pipe 3 introducing a liquid from fluid supply means; a concentric cylindrical injection nozzle 4 having a center axis in a direction parallel to a longitudinal direction and injecting a pressurized liquid; and a fine bubble formation pipe 7 having a larger diameter than the injection nozzle, disposed to be concentric circular and generating a fine bubble-containing liquid with an injection liquid and a gas from a self-priming hole 5.SELECTED DRAWING: Figure 1【課題】 解決しようとする問題点は、これまでの微細気泡の形成装置は大量の微細気泡を供給できない点、また、揚程、移送、多様な液体に対応できない点である。本願発明は円筒形を基本構造とし、種々の液体に対応し大量の微細気泡を発生させ、微細気泡含有水の揚程、移送を可能とした微細気泡形成装置を提供することを課題とする。【解決手段】 流体供給手段から液体を導く液体導入管3を有し、前記長手方向と平行な方向に中心軸を有し加圧液を噴射させる同心円筒形の噴射ノズル4を有し、前記噴射ノズルより大きな径で噴射液と自吸孔5からの気体により微細気包含有液を生じさせる同心円状に設けられた微細気泡形成管7を有する微細気泡形成装置である。【選択図】図1