PURPOSE: To easily experience the pseudo-weightless state by installing a capsule into which a human body is accommodated, with his face in contact state with the outside air, and the inside of which is charged with fluid and can be sealed, and supporting the capsule so that attitude can be freely changed by an attitude control means.

CONSTITUTION: A capsule 1 in which a human body 8 is accommodated is supported by an attitude control means 2, and the capsule 1 can be turned freely around the Z axis-in the longitudinal direction and the Y-axis in the horizontal direction. The capsule 1 is constituted of a capsule body 1A and a capsule cap 1B as the cover for the capsule body 1A, and the outer frame of the capsule body 1A is formed from a rigid wall 6 which is sufficiently pressure-resistive for the pressure close to the atmospheric pressure, and almost all the outer frame of the capsule cap 1B consists of the rigid wall 6, and a part consists of a soft wall 4 which can be expanded and contracted for the pressure. The soft wall 4 is set in the vicinity of a lung part 10 from a face 8A, and absorbs the volume change of the human body 8 in aspiration, and installed for the pressure adjustment for the external pressure. The inside of the capsule 1 is charged with warm water.