A connector comprises: a bottom plate, a body, and a retracting unit, wherein the body can insert a biological test piece from the front and provide an electrical connection from the bottom plate to the biological test piece, the groove is arranged above the body； the unloading unit comprises a The operating portion, the at least one elastic member and the contact portion, the operating portion is connected to the contact portion, the elastic member is in the shape of a sheet and comprises at least one bent portion, the elastic member is connected to the contact portion at one end, and the column is connected to the bottom plate at the other end. The hole has at least one protruding portion, the protruding portion is parallel to the groove, and the contact portion is disposed behind the body； the operating portion pushes the contact portion to move toward the body, and the protruding portion slides into the opening by the opening behind the groove Outside the test piece to the socket, the elastic element is compressed when the contact portion moves, and the elastic element resets the operation portion and the contact portion after the ejection is completed.一種連接器，包含：一底板、一本體、一退片單元，本體可從前方插入一生物試片並提供從底板到生物試片的電性連接，本體上方有溝槽；退片單元包含一操作部、至少一彈性元件及一接觸部，操作部連接接觸部，彈性元件形狀為片狀並包含至少一彎折部，彈型元件一端連接接觸部，另一端連接一柱體並置入底板的孔洞，接觸部有至少一凸出部，凸出部平行於溝槽，接觸部置於本體後方；操作部推動接觸部往本體方向移動，凸出部由溝槽後方之開口滑入推動生物試片至插口之外，接觸部移動時會壓縮彈性元件，完成退片後彈性元件將操作部及接觸部復位。
