PURPOSE: To prevent vibration generated when bubbles such as compressed air is spouted from being transmitted to the body in the neighborhood of a bathtub without providing a vibration-proof apparatus on the lower part of the bathtub.

CONSTITUTION: In an air bubble bathtub wherein a person taking a bath is massaged by spouting air bubbles, into water, the bottom face 2a of a main body 2 is not directly fixed on the floor face 21 but is fixed through only an apron part 3 of the bathtub. In addition, a clamping part is provided on the apron part 3 of the bathtub and a water-stopping and vibration-proof member 5 consisting of a foamed urethane, a hollow rubber, etc., is provided over the whole periphery of the apron on the clamping parts 4 and 4.