Provided is a hermetic compressor in which an electric element having a stator and rotor provided therein and a compression element driven by the electric element are housed and the compression element includes a shaft which has a main shaft portion and an eccentric shaft portion, a cylinder block, a main shaft bearing which is formed in the cylinder block and supports the main shaft bearing of the shaft, a piston which reciprocates, a connection mechanism which connects the piston to the eccentric shaft portion, and a thrust-ball bearing, the thrust ball bearing having a plurality balls and a holder portion for holding the balls, and the holder portion being formed of polymer obtained by polycondensating diaminobutane and adipic acid.