A discharge part structure of a compressor is disclosed. In the compressor comprising a cylinder assembly having a suction flow path and a discharge flow path, a Z-plate in the cylinder assembly for dividing an inner space into a plurality of compression spaces and for making a fluid be sucked, compressed, and discharged by being rotated by a motor unit, and vanes contacted to both sides of the Z-plate for dividing the respective compression spaces into a suction region and a compression region by reciprocation, an oil filtering space or a buffering space having a predetermined volume is formed at an outer side of a discharge flow path of the cylinder assembly. According to this, oil mixed with a fluid can be efficiently separated when the fluid is discharged, and vibration noise can be minimized.