PURPOSE: To give an aspiration action and a massaging effect which are effective for human body by constructing a bath tub so as to deliver a solid-liquid mixed fluid, which is composed of particulate matter such as ceramic particles and warm water, into the bath tub.

CONSTITUTION: Warm water from showers 6, 6 is first ejected to particulate matter 4 filled in a bath tub 11 before using the bath. The said warm water is collected into a heating vessel 2 after passing through a mesh plate 17 which is formed in a shape of hopper under air bags 23. Ceramic particles of 0.20 to 0.35cal/g°C in specific heat is preferable as the particulate matter for use. When the inside of connecting pipe 12 is made to a reduced pressure by a jet stream ejected from a nozzle 91, the particulate matter 4 is made to descend, mixed with the warm water 13 violently and sent onto a body 5 of bathing person as a solid-liquid mixed fluid by a strong pressure through a delivery pipe 14 and discharge opening 15. It is possible, therefore, for the bathing person to enjoy an aspiration action by a generating steam while burying the body 5 in the particulate matter 4 and also to sink the body 5 fully in the warm water by increasing it.