PURPOSE: A micro-bubble jet head of a foam generator for a bath tub is provided to make bubbles generated from the foam generator more minutely during the process of discharging a bubbled gas-liquid to the tub. CONSTITUTION: A micro-bubble jet head of a foam generator for a bath tub comprises the following: a head main body(210) including a head cover with multiple discharging holes in the front, and a hose connection unit in which one end of a gas-liquid discharge hose connected; a bubble diffusion cap(230) with a cylindrical shape with sealed front side while including a male screw formed on the outer circumference of the cap; a capsule body(250) formed with female screw on the inner circumference of the front side while including a cyclic mounting sheet in the rear inner circumference; a pressure plate penetrated with multiple pressure holes; a sealing ring installed in the front and the back of the pressure plate; and a capsule cap(260) formed in a disc shape.
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