A hermetic compressor has a hermetic container storing an oil, and a compressing element accommodated in the hermetic container and compressing a refrigerant gas; the compressing element has a compressing chamber, a cylinder forming the compressing chamber, a piston inserted into the cylinder and reciprocating, and a suction muffler (140) whose one end communicates with the compressing chamber; and the suction muffler (140) has a sound deadening space (142), a gas flow forming part (144) forming a gas flow (143) flowing in a constant direction in the sound deadening space (142), and an oil discharged opening (146) provided in a downstream side of the gas flow (143) in a lower part of the sound deadening space (142). By this constitution, there is realized the hermetic compressor in which the oil is more difficult to remain in the suction muffler (140), whose noise is lower, and whose performance is stabilized.