Provided is a centrifugal separator that can perform separation of mixed fluids ranging in quantity from a very small value to a large value by simple operation. This centrifugal separator is characterized in that the separator includes a channel (20) for making mixed fluids (MF) heterogeneous while passing the mixed fluids (MF) therethrough by a centrifugal force about the axis of rotation and a supply port (30) for supplying the mixed fluids (MF) into the channel (20), a discharge channel (41) for discharging the fluid (HF) having a large specific gravity among the mixed fluids (MF) from the channel (20), and a discharge channel (42) for discharging the fluid (LF) having a small specific gravity among the mixede fluids (MF).
