To provide an accumulator-integrated compressor and vapor-compression refrigerating system in which an accumulator part A is integrated in a simple structure.

The compressor comprises a compression mechanism C at the top part, a motor part M provided below the compression mechanism C, the accumulation part A provided below the motor part M. A refrigerant inlet 14 is provided above the accumulator part A. Thus, lubricating oil and redundant liquid-refrigerant which are mixed in the refrigerant gas flowing from the refrigerant inlet 14, are separated by sedimentation in a pressure-tight hermetic vessel 10, and stored in the accumulator part A provided at the bottom part. The gas refrigerant G, in which the lubricating oil and liquid refrigerant are separated from each other, is supplied from a refrigerant supply path formed in the pressure-tight hermetic vessel 10 to the compression mechanism C provided at the top part. Thus, an airtight partition to be provided between the compression mechanism C and the accumulator part A can be eliminated, and the accumulator part A is integrated in the simple structure.