A Stirling refrigerator, which prevents oil rising with longer life of an oil seal bellows, and includes a housing, cylinder, piston, piston rod and an oil seal bellows. A motor and a crank are disposed inside the housing; a cylinder fixed on a top of the housing; a piston, reciprocating inside the cylinder; a piston rod moving with the crank, wherein one end of the piston rod links the piston and passes through the housing; and an oil seal bellows sealing a space between the housing and the cylinder, wherein a tip end of the oil seal bellows is sealed and fixed on the piston or the piston rod inside the cylinder, and a base end of the oil seal bellows is installed on the housing, and the oil seal bellows reciprocating with a stroke, wherein the tip end of the oil seal bellows is compressed to a compression side from a position of free length then returns to the position of free length. |