Compressor

A rotary compressor comprising:

• a drive mechanism including a vertically-extending drive shaft formed with an eccentric part;
• and
• a compression mechanism including
• a tubular cylinder covering an outer periphery of the eccentric part,
• a piston arranged inside the cylinder and fitted onto the eccentric part,
• an upper end plate closing an upper end of the cylinder, and
• a lower end plate closing a lower end of the cylinder,
• a lower end surface of the eccentric part defining a thrust bearing surface slidably contacting an upper end surface of the lower end plate,
• the drive shaft having an oil path formed inside the drive shaft, lubrication oil circulating through the oil path, and
• the eccentric part having a pressure reduction groove formed therein, the pressure reduction groove opening at part of the thrust bearing surface close to an inner circumferential side, extending in a circumferential direction, and being configured to reduce a pressure of the lubrication oil supplied from the oil path to the pressure reduction groove.