To provide a compressor provided with a cylinder block having a cylinder bore, a piston reciprocating and moving in the cylinder bore, a valve plate in which an absorption hole for leading refrigerant gas into the cylinder bore and a discharge hole for leading refrigerant gas in the cylinder bore outside the cylinder bore are formed, an absorption valve like a belt plate opening and closing the absorption hole, and a discharge valve like a belt plate opening and closing the discharge hole to suppress self-excitation vibration of the absorption valve of the compressor in which an absorption valve opening regulation recessed part having a bottom face on which a tip part of the absorption valve is abutted when opening the absorption valve is formed on a peripheral wall at one end opposing to the absorption valve of the cylinder bore and suppress self-excitation vibration of the absorption valve.

This compressor is provided with a means for preventing flow of refrigerant gas passing through the absorption valve and flowing into the cylinder bore from becoming a plurality of flow having substantially the same flow rate.