An injectible two-staged rotary compressor for use in a heat pump system that employs an injection refrigerating cycle, the rotary compressor comprising: - a sealed container; - a lower stage compressing unit (11 L); - an upper stage compressing unit (11 H); - a motor that drives the lower stage compressing unit (11 L) and the upper stage compressing unit (11 H); - a first suction pipe that is connected to a suction side of the lower stage compressing unit (11 L) to lead a low-pressure refrigerant of the injection refrigerating cycle to the lower stage compressing unit (11 L); - an interconnecting path (180L, 210L, 230, 35H) that connects a discharging side of the lower stage compressing unit (11 L) to a suction side of the upper stage compressing unit (11 H); - a discharging pipe that is connected to the sealed container, to discharge a high-pressure refrigerant, discharged into the sealed container from the upper stage compressing unit (11 H), into the injection refrigerating cycle; and - a second suction pipe that leads an intermediary-pressure injected refrigerant that is a wet refrigerant from the injection refrigerating cycle to the interconnecting path (180L, 210L, 230, 35H), and a part of which is arranged for exchange of heat, the heat being absorbed by the intermediary-pressure injected refrigerant, either -- in the high-pressure refrigerant discharged from the upper stage compressing unit (11 H) in the sealed container, or -- in an upper stage discharging muffler room, provided at the discharging side of the upper stage compressing unit (11 H), into which the high-pressure refrigerant is discharged from the upper stage compressing unit (11 H), or -- in lubricating oil sealed in the sealed container, or -- on the external surface of the sealed container or -- as a connection for leading said intermediary-pressure injected refrigerant through an external heat exchanging room formed by covering a part of the external surface of the sealed container, the part of the external surface of the sealed container serving as a heat transferring surface. - a sealed container; - a lower stage compressing unit (11 L); - an upper stage compressing unit (11 H); - a motor that drives the lower stage compressing unit (11 L) and the upper stage compressing unit (11 H); - a first suction pipe that is connected to a suction side of the lower stage compressing unit (11 L) to lead a low-pressure refrigerant of the injection refrigerating cycle to the lower stage compressing unit (11 L); - an interconnecting path (180L, 210L, 230, 35H) that connects a discharging side of the lower stage compressing unit (11 L) to a suction side of the upper stage compressing unit (11 H); - a discharging pipe that is connected to the sealed container, to discharge a high-pressure refrigerant, discharged into the sealed container from the upper stage compressing unit (11 H), into the injection refrigerating cycle; and - a second suction pipe that leads an intermediary-pressure injected refrigerant that is a wet refrigerant from the injection refrigerating cycle to the interconnecting path (180L, 210L, 230, 35H), and a part of which is arranged for exchange of heat, the heat being absorbed by the intermediary-pressure injected refrigerant, either -- in the high-pressure refrigerant discharged from the upper stage compressing unit (11 H) in the sealed container, or -- in an upper stage discharging muffler room, provided at the discharging side of the upper stage compressing unit (11 H), into which the high-pressure refrigerant is discharged from the upper stage compressing unit (11 H), or -- in lubricating oil sealed in the sealed container, or -- on the external surface of the sealed container or -- as a connection for leading said intermediary-pressure injected refrigerant through an external heat exchanging room formed by covering a part of the external surface of the sealed container, the part of the external surface of the sealed container serving as a heat transferring surface. -- in the high-pressure refrigerant discharged from the upper stage compressing unit (11 H) in the sealed container, or -- in an upper stage discharging muffler room, provided at the discharging side of the upper stage compressing unit (11 H), into which the high-pressure refrigerant is discharged from the upper stage compressing unit (11 H), or -- in lubricating oil sealed in the sealed container, or -- on the external surface of the sealed container or -- as a connection for leading said intermediary-pressure injected refrigerant through an external heat exchanging room formed by covering a part of the external surface of the sealed container, the part of the external surface of the sealed container serving as a heat transferring surface.