To provide a Stirling refrigerator capable of reducing the occurrence of such defects that cracking or fatigue failure occurs by the repeated vibration of the Stirling refrigerator applied to a refrigerant flow pipe and a cooling side evaporator.

The refrigerant flow pipe 3 and the evaporator 32 of a secondary refrigerant circulating circuit 3 formed by connecting a condenser 31 installed at the low temperature part 21 of the Stirling refrigerator to the evaporator 32 installed in the body 1 of the Stirling refrigerator A through the refrigerant flow pipe 33 are movably supported on the body 1 of the Stirling refrigerator A.