To sustain levitation stably even if an actuator is rotated by vibration of a secondary coil in an actuator which levitates a secondary coil by a magnetic repulsive force induced in the secondary coil by energizing a primary coil.

In a superconducting actuator comprising a primary coil connected with a power supply, and a secondary coil for levitation which forms a closed circuit by connecting the opposite ends of a superconducting wire, generating magnetic flux which repels a magnetic flux generated in energizing the primary coil in the secondary coil and levitating the secondary coil by repellence of magnetic flux, the secondary coil consists of first through third coils which are fitted and coupled together in the directions of X axis, Y axis and Z axis passing through an identical central point, the primary coil includes the outside diameter equal to 1.2-100 times that of the secondary coil, and a repellent magnetic flux is generated so that the central axis of one coil in the secondary coil includes the same direction as that of the primary coil, thus holding levitation of the secondary coil.