To provide a desired unique device for solving current technical and environmental problems on an object to fly in the air.

Differently from a conventional structure, this antigravity device uses centrifugal force. A main machine is rotated, and a plurality of sub-machines is kept at elevation angles are conically installed on the upper part thereof. The centrifugal force is applied to the device mounted on the sub-machines differently between the upper point position and the lower point position because of a difference in arc drawing in view from the axis of rotation of the main shaft. The centrifugal force is proportional to the rotating speed of the main machine, and it is transmitted to the sub-machines to produce upward buoyancy.