Abstract: A superconducting rotating machine, including: a stator that has a tubular stator iron core and stator windings wound around the stator iron core and generates a rotating magnetic field; a superconducting rotor having: a superconducting squirrel-cage winding that is held rotatably with the rotating magnetic field of the stator on an inner peripheral side and has one or more rotor bars and end rings each made of a superconducting material; and a rotor iron core that has a plurality of slots to accommodate the rotor bars; a pulse voltage output unit that outputs a pulse voltage to shift the superconducting squirrel-cage winding to a magnetic flux flow state; a drive voltage output unit that applies a drive voltage to the stator windings to rotationally drive the superconducting rotor, wherein the pulse voltage output from the pulse voltage output unit is superimposed on the drive voltage.