This invention relates to a trocar, comprising a main body having a barrel part, a tube part, and two locking part a clamp sealing member installed to the main body and having a clamp sealing seam and two locking part located at two ends of the long seam of the clamp sealing seam respectively locked with the locking part of the main body and a piercing member having a piercing part capable of being penetratingly disposed to the clamp sealing seam of the clamp sealing member and inserted to the tube part of the main body. This invention can also relates to a trocar, comprising a main body having a barrel part, a tube part a clamp sealing member installed to the main body and having a clamp sealing seam a first valve member disposed above the clamp sealing member and having a valve hole a bind sealing member disposed above the first valve member and having a sealing hole and a piercing member having a piercing part capable of being penetratingly disposed to the valve hole of the first valve member, the sealing hole of the bind sealing member, and the clamp sealing seam of the clamp sealing member, and inserted to the tube part of the main body.一種穿刺器,包含有一本體,具有一筒部,一管部,兩卡掣部;一夾封件,裝設於該本體;該夾封件具有一夾封縫,兩卡掣部位於夾封縫的長縫向兩端分別與該本體的卡掣部卡掣;一穿刺件,具有一穿刺部可穿設該夾封件的夾封縫及插設於該本體的管部。或者,一種穿刺器,包含有一本體,具有一筒部,一管部;一夾封件,裝設於該本體;該夾封件具有一夾封縫;一第一瓣件,設於該夾封件上方;該第一瓣件具有一瓣孔;一束封件,設於該第一瓣件上方;該束封件具有一封孔;一穿刺件,具有一穿刺部可穿設該第一瓣件的瓣孔、束封件的封孔、夾封件的夾封縫、及插設於該本體的管部。(10)‧‧‧第一本體(20)‧‧‧第二本體(80)‧‧‧端蓋件(90)‧‧‧穿刺件
