A kind of blood-taking device, an ontology with built-in percussion unit takes blood needle to be used as mankind's finger tip or the sampling of other position capilaries with replaceable one, ontology front end is equipped with a dismountable front cover, and front cover is mutually to be arranged by an outer housing with positioning piece, blood needle is taken to be slideably installed with, is set between what locating piece and outer housing with more an anti-vibration structure. Therefore, when taking blood needle to be fired and moved by percussion unit, it can halt when taking stop section of the front end crash of blood needle to locating piece, and moment inverts its moving direction, all directions vibration energy caused by blood needle front end crash locating piece is taken at this time, it can largely or entirely will be absorbed by anti-vibration structure, thus the amplitude of vibration being subjected to when user's blood sampling is greatly decreased, and then the feeling of pain of user is preferably minimized.一種採血裝置，具有內建擊發單元的一本體與可置換的一取血針作為人類指尖或其他部位微血管採樣之用，本體前端設有一可拆卸的前蓋，且前蓋是由一外殼體與一定位件相互套設而成，用以可滑動地容設取血針，更具有一避震結構設於定位件與外殼體之間。因此，當取血針被擊發單元擊發而移動時，取血針的前端碰撞到定位件的擋止部時會停止前進，並瞬間反轉其移動方向，此時取血針前端碰撞定位件所產生的各方向震動能量，將大部分或全部會由避震結構吸收，因而使用者採血時遭受的震幅大幅減少，進而使用者的疼痛感降到最低。
