Provided is a swirl-flow gas-liquid mixing device for aquaculture with which it is possible, using a single water-suctioning pump, to automatically supply oxygen and a feed by an ejector and a swirl flow and to remove waterborne foreign matter. A slide tube is provided with a floating body whereby a gas-liquid suction port in which blades at the tip are twisted in one direction is constantly kept at the water surface, said slide tube being loosely fitted to the outer periphery at the tip of a gas-liquid mixing tube, with a protrusion and a cutout part for preventing rotation being fitted together. The discharge port of an introduction tube is inserted at an appropriate position into the gas-liquid mixing tube, which has a curved tube of greater diameter. A plurality of swirl guide plates having a moderately curved surface are joined in the resulting gap section and are inclined relative to the axial direction in the same direction as the twist in the blades. The discharge port of the gas-liquid mixing tube is inserted into one end section of a gas-liquid discharge tube, which has a curved tube having a greater diameter, at an appropriate position in a bottom suction port provided so as to be similar in shape to the gas-liquid suction port. A plurality of swirl guide plates having a moderately curved surface are joined in the resulting insertion gap section and are inclined relative to the tube axis direction in the same direction as the twist in the blades at the bottom suction port. An air bleed hole 19 is provided at the highest part of the gas-liquid discharge tube.Linvention concerne un dispositif de mélange gaz-liquide à écoulement tourbillonnant destiné à laquaculture avec lequel il est possible, à laide dune seule pompe daspiration deau, de fournir automatiquement de loxygène et une alimentation par un éjecteur et un écoulement tourbillonnant et pour retirer des matières étrangères aqueuses. Un tube coulissant est pourvu dun corps flottant, moyennant quoi un
