Gas lubricating structure of a Stirling engine

In a case in which a gas lubrication is carried out under static pressure by a provided with a pair of cylinders of a high-temperature side cylinder 20 and a low temperature side cylinder 30 Stirling engine is a gas lubricating structure of a Stirling engine having an introduction pipe 70a for introducing a working fluid within a low working space temperature is present, provided at least an interior of an expansion piston 21 of the expansion piston 21 and a compression piston 31 in, and the working chamber a low temperature is present in a working space in which circulates the working fluid between the cylinders 20 and 30, and in a driving state, a temperature the working fluid in the working chamber is lower than the low temperature of the working fluid in a working chamber of a high temperature side cylinder 22nd