An object is to provide centrifugal-separation oil separation means capable of improved cyclone efficiency and a refrigeration device equipped with the same. The oil separation means includes an outer cylinder (2) that extends in an axial direction; an inner cylinder (3) that passes through the interior of the outer cylinder (2) in the axial direction; a pair of end plates (4a, 4b) provided at both ends of the outer cylinder (2) in the axial direction; an inlet port (5) that is connected to the outer cylinder (2) near one of the end plates (4a) and that introduces an oil-containing fluid discharged from a compressor into a space (7) formed between the outer cylinder (2) and the inner cylinder (3) so as to swirl about the axis; an outlet port (6) that is connected to the outer cylinder (2) near the other end plate (4b) and that expels the fluid, from which the oil has been centrifugally separated, out of the space (7); and an oil discharge port, provided in the outer cylinder (2), for discharging the separated oil out of the space (7), wherein a partition plate (8, 9) that extends over at least part of a cross-section perpendicular to the axial direction to partition the space (7) in the axial direction is provided in the space (7).