<p>A refrigerating apparatus, wherein a pressure regulating valve (71) for reducing a pressure on the suction side of high- stage compressors (11) and (12) less than a pressure in the dome of a low-stage compressor (55) is connected to the delivery side of the low-stage compressor (55). One end of an oil return passage (72) is connected to the dome of the low-stage compressor (55) and the other end is connected to the suction side of the high-stage compressors (11) and (12) by bypassing the pressure regulating valve (71). Thus, a refrigerator oil stored in the dome of the low-stage compressor (55) can be returned to the high-stage compressors (11) and (12).</p>
