Abstract: A centrifuge in particular for medical use, comprising a vacuum chamber housing a centrifuge rotor, means for driving said rotor, at least one elongate vessel for substances to be separated, which vessel is pivotally suspended from the rotor in a pivot in such a manner that the central longitudinal axis of the vessel is directed substantially vertically when the rotor is at rest, but occupies a radial position at least at the operating speed of the rotor, in which latter position the vessel extends through an opening in an element formed integrally with, or attached to the rotor, in which position the vessel is retained in the radial outward direction by retaining means.