To provide a centrifugal sorter in which a continuous rotor and a normal rotor without decreasing a cooling capability are usable.

The centrifugal sorter 30 has a constitution that the continuous rotor and the normal rotor without decreasing the cooling capability are usable. In case of installing the normal rotor not using a sample tube 12 inside a concave portion 4b for a tube setting as a rotor 2 of the centrifugal sorter 30, the concave portion 4b for setting the tube is blocked, and in case of using the continuous rotor having the tube 12 installed, an adapter member 13 opening the concave portion 4b for setting the tube is attached openably and closably to a door 4, by which in using the normal rotor, the windage loss can be reduced by blocking or embedding the adopter member 13 in the concave portion 4b for the tube setting.