The compressor of the invention is reduced in the size of separation chamber by eliminating the separation pipes in the separation chamber, and is hence manufactured at low cost. The compressor of the invention is a compressor comprising a compressing mechanism (1, 2, 4) for compressing a fluid that contains lubricating oil, and a separation chamber (51) that is revolved by having introduced thereinto the fluid compressed by the compressing mechanism (1, 2, 4) and in which at least part of the lubricating oil contained in the fluid is separated by the centrifugal force produced by this revolution, in which only the introduced fluid is present in the separation chamber.