PURPOSE: To achieve the maximum transfer distance at a low cost by making interval between bearing to be set changeable, and to make a transfer device compact by composing electromagnets for preventing rotation of a flotation body possible to be omitted.

CONSTITUTION: A throughhole 14 is provided in a base 2. The throughhole 14 is bored toward a magnetic shaft bearing part 12. The magnetic bearing part 12 is detachably installed to the base 2 by a screw 15 inserted into the throughhole 14. The other magnetic bearing parts are also detachably installed to the base 2 similarly. In the meanwhile, four protruding parts 22-25 are provided in an outer circumferential surface of a flotation body. The protruding parts 22-25 are formed to face cores 16a-19a of electromagnets 16-19 along the length of the flotation body. Rotation of the flotation body 1 about an axial center O1 can thus be prevented by an electromagnetic aligning property.