It is an object to enhance compressor efficiency by reducing pressure losses in a discharge muffler space into which is discharged a refrigerant compressed by a compression unit. A low-stage discharge muffler space (31) is formed in the shape of a ring around a drive shaft (6). In the low-stage discharge muffler space (31), a communication port flow guide is provided so as to cover a predetermined area of an opening of a communication port (34) from a side of a flow path in a reverse direction out of two flow paths in different directions around the drive shaft (6) from a discharge port (16) through which is discharged the refrigerant compressed by a low-stage compression unit to the communication port (34) through which the refrigerant flows out. The communication port flow guide transforms a direction of a flow into a direction of a connecting flow path.
