The centrifugal blood pump is esp. for heart replacement installations. It has a fluid and gas-tight closed housing with at least one blood inlet and one blood outlet. It contains a rotatably arranged pump rotor driven by an external drive motor using a magnetic coupling. The pump rotor (15) over its periphery has equally distributed ferromagnetic areas (17) influenced by permanent magnets (21) equally distributed on the periphery of a rotary coupling part (12,13,14,15,16,17,20) connected to the drive motor. For additional stabilisation against translation in the radial direction, the pump rotor is mechanically located, eg. by a bearing disc 24, without a seal within the pump housing in the blood throughflow area.
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