A kind of separator can be placed in centrifuge in receptive liquid Hou, and to carry out centrifugal treating to liquid, the blood component of different specific weight in the liquid is separated, and constitute different liquid levels. Provided separator system has hollow body, elastic cock body and stop configurations. Resilient plug system is installed in the inside of what hollow body, and is in close contact with the inner wall of hollow body, the inside of hollow body can be separated out closed fluid space, is contaminated in order to the liquid for preventing inside from being accommodated. Elastic cock body can the sliding of opposite hollow ontology, liquid is inserted in fluid space, or the liquid of fluid space is enabled to leave. The sliding of stop configurations system what backstop elasticity cock body, leaves hollow body to avoid elastic cock body.一種分離裝置，可在接受液體後置入離心機中，以對液體進行離心處理，將該液體中不同比重的血液成份分離，而構成不同的液體層。所提供的分離裝置係具有中空本體、彈性塞體與止擋結構。彈性塞體係容設於中空本體的內部中，且與中空本體的內壁面緊密接觸，可將中空本體的內部隔出封閉的液體空間，俾防止內部所容納的液體受到污染。彈性塞體可相對中空本體滑動，以將液體填入液體空間中，或令液體空間的液體離開。止擋結構係用於止擋彈性塞體的滑動，以避免彈性塞體離開中空本體。
