Disclosed is a puncture outfit, comprising a seal assembly (3). The seal assembly (3) comprises a plurality of elastic sealing pieces (3-2), wherein each elastic sealing piece (3-2) comprises a conical surface thin walled part (3-21) which is conical and an annular part (3-22) connected at the bottom of the conical surface thin walled part (3-21). A fan-shaped notch (3-20) is provided at the conical surface thin walled part (3-21), and the top of the fan-shaped notch (3-20) is that of the conical surface thin walled part (3-21). At least the wall thickness of the top-edge of the fan-shaped notch (3-20) at the edge of the fan-shaped notch (3-20) is less than that of the rest of the conical surface thin walled part (3-21) and/or at least the wall thickness from the bottom to the top of the conical surface thin walled part (3-21), at an area opposite to the fan-shaped notch (3-20) at the conical surface thin walled part (3-21), gets gradually thinner and thinner. Such a structure facilitates the top-edge in closely enclosing and fitting on a puncture rod or other surgical instruments, and facilitates the even distribution of the tension of the top-edge of the plurality of elastic sealing pieces to avoid the case of an individual top-edge uplift as a result of unevenly distributed tension, thus having a better enclosed performance and gas-tightness.Linvention concerne un matériel de ponction comprenant un ensemble joint (3). Lensemble joint (3) comprend une pluralité de pièces détanchéité élastiques (3-2), chaque pièce détanchéité élastique (3-2) comprenant une partie à paroi mince de surface conique (3-21) qui est conique et une partie annulaire (3-22) reliée à la partie inférieure de la partie à paroi mince de surface conique (3-21). Une encoche en forme de ventilateur (3-20) est placée sur la partie à paroi mince de surface conique (3-21), et la partie supérieure de lencoche en forme de ventilateur (3-20) est celle de la partie à paroi mince de surface conique (3-21)
