To constitute a refrigerant supply/exhaust pipe for securing an amount of refrigerant supply/exhaust that becomes necessary due to the increased size of a superconducting rotary electric machine sufficiently.

A device has a mechanism for guiding a gas that exists in the vacuum heat-insulation layer of a rotor to a rotor terminal part shaft through a vacuum exhaust path and for collecting it at a still part from a vacuum exhaust port and a vacuum seal mechanism for mutually isolating atmosphere and vacuum part provided at the interval between the rotary shaft and the still part of the vacuum exhaust port part of the collection mechanism. In this case, a space part that is inserted into a center hole that communicates with the inside of the rotor and is located between a refrigerant injection pipe 42 for supplying a refrigerant from a refrigerant supply port 29a at the shaft end face side and a center hole is formed as a vacuum exhaust path 30 that communicates with the vacuum heat-insulating layer of the rotor, and a vacuum exhaust port 31 for collecting a gas that is guided to a rotor terminal part shaft 21 through the vacuum exhaust path 30 to the still part is provided between a refrigerant exhaust port 22 of a refrigerant exhaust path 23 that is formed inside the rotor terminal shaft 21 while it is connected to the inside of the rotor and the refrigerant supply port 29a.