The utility model is a kind of blood testing machine of anti-mis-insertion, it has one to measure display unit, a connector and a barrier structure, connector setting is measuring inside display unit and is being equipped with an at least guide groove, barrier structure is attached in the outside wall surface for measuring display unit and obstructs the part opening of connector, what is in actual use, test paper equipped with short slot can be fastened in the guide groove of connector and complete to connect, when the installation direction mistake of test paper, then test paper will receive the barrier of barrier structure, so can avoid mispluging for test paper.本新型為一種防誤插之血液測試機，其具有一量測顯示單元、一連接器及一阻擋結構，連接器設置在量測顯示單元內部並設有至少一導槽，阻擋結構貼附在量測顯示單元之外壁面上並阻隔連接器之部份開口，於實際使用時，設有缺槽之試紙可卡合在連接器之導槽中並完成連接，當試紙之安裝方向錯誤，則試紙會受到阻擋結構的阻隔，如此可避免試紙的誤插。
