PURPOSE: To convert rectilinear motion force into revolving motion force to make it possible to transfer it to a driven shaft to control a driver and the driven shaft in a state of non-contact.

CONSTITUTION: A plurality of magnetic circumferential surfaces G where N poles 3an, 3bn and S poles 3as, 3bs are alternately provided in the circumferential direction are provided parallel to the axis K. Phases of the magnetic circumferential surfaces G are deflected around the axial center K, a magnetic surface section J where N poles 4n and S poles 4s are alternately provided directed to an driven shaft 2 rotatable around the axis K is formed on a driver 1. The driver 1 is provided movably on the surface along a surface including the axis K of the driven shaft 2.