<;P>;PROBLEM TO BE SOLVED: To provide an apparatus for control of plasma components from which pathogens such as virus are removed from the whole blood, and its control method. <;P>;SOLUTION: Plasma components are separated by centrifugal force, and filtered out by a particle filter by centrifugal force in the blood component separation method and an apparatus therefor. <;P>;COPYRIGHT: (C)2007,JPO&INPIT