A blood collector includes a tube body, a cap and a draw rod, one end of the tube body is provided with a collection part, the collection part is shrunk to form a set of connection parts, the connection part is provided with an outlet, the inner wall of the tube body is provided with a plurality of ribs, the inner part of the tube body is provided with a piston body, the piston body is provided with a screw hole and a concave part matched with the ribs, the cap is provided with a blind hole matched with the collection part and the outlet of the set of connection parts The pull rod is provided with a screw part which is screwed with the screw hole.It can be used for extracting blood, injecting platelets and separating bleeding plasma, platelets and serum. It can simplify procedures and save medical equipment by using the same tube for extracting blood, separating platelets and injecting platelets.一種採血器，包含：管體、帽蓋及抽拉桿，管體一端設收集部，該收集部並縮束形成一套接部，該套接部設一出口，該管體內壁環形分設複數肋條，該管體內部設一活塞體，該活塞體設螺孔及與肋條配合的凹部，該帽蓋設有與該收集部組配的盲孔並將該套接部的出口封住，該抽拉桿設有與螺孔螺合的螺桿部。藉此可為抽取血液及注射血小板並分離出血漿、血小板及血清的各種用途，讓抽血、分離出血小板及注射血小板皆使用同一管體，達簡化手續及節省醫療器材目的。
