A compressor include a casing, a drive unit including a stator and a rotor accommodated in the stator, a rotation shaft coupled to the rotor and configured to be rotated by the rotor, a compression unit that is coupled to the rotation shaft, that is lubricated with the oil, and that is configured to compress and discharge the refrigerant, and an oil-separator that is disposed between the discharge part and the drive unit and that is configured to separate the oil from the refrigerant and guide the refrigerant to the discharge part. The oil-separator includes a centrifugal separator configured to rotate together with the rotation shaft and configured to generate a centrifugal force to separate the oil from the refrigerant, and a coupler coupled to the rotor or the rotation shaft and configured to rotate the centrifugal separator based on rotation of the rotating shaft.