<p>Disclosed is a specimen preprocessing system capable of conveying carriers without reducing processing capacity in accordance with how specimens on trays to be charged are arranged. Also disclosed is a specimen preprocessing system capable of preventing a reduction in processing capacity of analyzing devices connected to the system via connecting lines. Specifically, a centrifuge unit that is located in an upstream process among a plurality of processing units included in a specimen preprocessing system and that processes a plurality of specimens in a collective manner includes a control means that changes the order of sending the specimens that have undergone centrifugation. With this, processing capacity of the processing units located in downstream processes can be prevented from being reduced.</p>
