To provide a microbubble generating nozzle 10 capable of generating a large amount of microbubbles residing effectively in a liquid for a long time.

The microbubble generating nozzle 10 comprises: an introducing member 1 introducing a pressurized liquid; a liquid blow-out member including a first nozzle hole 7 discharging the liquid in the longitudinal direction of the introducing member, and a second nozzle hole 11 discharging the liquid from the introducing member 1 in the different direction from its longitudinal direction; and a liquid mixing member 3 including a gas hole 6 taking the gas in and surrounding the first nozzle hole 7 and the second nozzle hole 11, and a blow-out hole 8 formed in the direction of discharging the liquid from the first nozzle hole 7.

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