Centrifugal field-flow fractionation device

A centrifugal field-flow fractionation device comprising:

• a rotor having a rotation axis, the rotor being provided to be rotatable about the rotation axis;
• a cover configured to cover the rotor;
• a protective member arranged on an inner side of the cover, the protective member covering the rotor about the rotation axis;
• a shock-absorbing member arranged between the protective member and the cover;
• and
• a fixing part provided in a breakable manner, the fixing part fixing the protective member to the cover,
• wherein the rotor is arranged such that the rotation axis orients in a horizontal direction, and
• wherein in a case where a portion of the rotor disintegrates and is brought into contact with the protective member during a rotation of the rotor, the fixing part breaks to allow the protective member and the shock-absorbing member to be movable together with the rotor while receiving impact of the rotor to buffer kinetic energy of the rotor.