PURPOSE: To facilitate installation work and maintenance services by drawing air by water suction pressure of a submerged pump through an air suction means, and at the same time, mixing/stirring air and water using an impeller to permit generation of bubbles from a suspended water discharge hose tip.

CONSTITUTION: This bubble generation device is equipped with a submerged pump 1 having an impeller 5 which sends under pressure the water drawn from a water suction orifice 11b toward a water discharge orifice 4 using a motor 2 which drives the impeller to rotate, an air suction means 6 with one end part protruding open above a water level and the other end part facing the water suction orifice 11b of the submerged pump 1, and a water discharge hose 12 connected to the water discharge orifice 4. Air is sucked by water suction pressure of the submerged pump 1 through the air suction means 6, and at the same time, the air and water are mixed and stirred using the impeller 5 to generate the bubbles from the tip of the suspended water discharge hose 12. Consequently, it is possible to perform installation work and maintenance services easily and obtain a great aeration effect.