The invention provides a plasma collection device, which comprises a tube body, wherein a first tube body part, a tube neck part and a second tube body part are sequentially formed along an axial direction.The first tube body part is provided with a first opening and an outer flange,The second tube body part is provided with a second opening,The neck of the tube is connected with the first tube body part and the second tube body part；Cap body,To cover the first opening,The cover body has an inner plug part and an outer ring part,The internal plug part is arranged in the lumen of the first pipe body part,The outer ring part is against the outer flange,Make the cover cover cover the first opening；Piston,In the lumen of the second body part,To close the second opening；And putters,And the piston is correspondingly arranged in the lumen of the second pipe body part,And sliding in the axial direction makes the push rod slide against the piston to drive the piston to slide,To adjust the position of blood stratification,To highlight the effect of specific blood layers.本創作係提供一種血漿採集裝置，包含：管體，其沿一軸向方向依序形成第一管體部、管頸部、第二管體部。第一管體部具第一開口及外凸緣，第二管體部具第二開口，管頸部連接第一管體部與第二管體部；蓋體，用以遮蓋第一開口，蓋體具有內塞部與外環部，內塞部容置於第一管體部之管腔，外環部與外凸緣相抵，使蓋體遮蓋第一開口；活塞，設於第二管體部之管腔內，用以封閉第二開口；以及推桿，與活塞對應設置於第二管體部之管腔內，並沿軸向方向滑動使推桿滑動至與活塞相抵以驅動活塞滑動，達成調整血液分層位置，以突顯特定血液層之效果。
