移液装置（2），用于通过一个隔膜服用的液体样品从上侧（70）密封的样品容器（52），其包括Pipeftiernadel（4）和辅助套管（18），用于隔膜的穿刺，这对于通过辅助套管轴向地执行所述移液针 形成，其特征在于，所述移液装置包括引导臂（6），在其下端（10）的端板（12）布置，它是沿着导向臂抵靠弹性阻力轴向移动的那个的定心装置（14） 被提供，其可插入到所述导向臂的端板，并且所述径向外周向围绕分布定心至少三个​​中心指形成（26）与锥形斜面（34），其形成用于样品容器和操作样品容器中的上侧的压紧装置 可以从外面拥抱。 因此，使用非常薄的移液针安全地刺穿试样容器的隔膜并稍微从隔膜拉出吸液针，即使有可能在结构上简单的移液。

A pipetting device (2) for taking samples of liquid from an upper side by a septum (70) sealed sample vessel (52) comprising a Pipeftiernadel (4) and an auxiliary cannula (18) for piercing of the septum, which for axially performing the pipetting needle through the auxiliary cannula is formed, is characterized in that the pipetting device comprises a guide arm (6), at its lower end (10) an end plate (12) is arranged, which is axially displaceable along the guide arm against a resilient resistance that a centering device (14) is provided, which is insertable into the end plate of the guide arm, and that the radially outer circumferentially around the centering distributed at least three centering fingers (26) with conical bevels (34) are formed which form a hold-down device for the sample container and the upper side during operation the sample vessel can embrace from the outside. Thus, it is possible in a structurally simple pipetting even when using very thin pipetting needles to pierce the septum of a sample vessel safely and slightly pull out the pipetting needle from the septum.