A cord blood sampling device (1), the device (1) comprising a chamber (2) in fluid communication with a tapered nozzle (4), the tapered nozzle (4) comprising at least one step along its length. A part (20) is further provided. [Selection diagram] Fig. 3臍帯血採取装置(1)であって、装置(1)は、先細ノズル(4)と流体連通するチャンバ(2)を備え、かつ先細ノズル(4)はその長さに沿って少なくとも1つの段部(20)をさらに備える。【選択図】図3