PURPOSE: To discharge a jet flow in which foam is mixed in flow water even if a jet nozzle is used in a bottom part and a deep part of a bathtub by connecting vertically an inflow cylindrical body and a tip opening part, forming a jet flow chamber in the tip opening part, and providing a closed wall on which a jet flow generating port of a small diameter is opened.

CONSTITUTION: In a jet nozzle 1 which is fixed to an inside wall of a bathtub, generates foam and mixes it in flow water, a turbulent flow chamber 6 of large volume is formed in the tip opening part, a cylindrical inflow body 7 is formed integrally on its upper part cylindrical wall surface 2, and the inflow cylindrical body 7 and the tip opening part 5 are connected vertically through the turbulent flow chamber 6. Also, an outer cylinder 10 formed in the tip of the turbulent flow chamber 6 and the tip opening part 5 communicate with each other, the lower half of the outer cylinder 10 is closed by a closing body 11, and on the cylindrical wall surface 12 of the upper part, an air supply cylindrical body 13 for communicating with the air is formed integrally. A discharge side cylindrical body 14 is divided into a jet flow chamber and a flow water chamber 17, and on the base end side of the jet flow chamber, a closed wall 18 is formed and a jet flow generating hole 19 of a small diameter is pierced.