A kind of bone anchoring device connects the combining unit of first bone plate and the second bone plate comprising one first bone plate, one second bone plate and one. First bone plate includes an ontology,And one from the outwardly extending extended segment of the ontology,Second bone plate includes an ontology,And one from the outwardly extending setting section of the ontology,The combining unit includes the first engaging portion of an extended segment for being formed in first bone plate,And one be formed in second bone plate setting Duan Bingneng match the second engaging portion that card is set with what with first engaging portion,The combining unit enables first bone plate and the second bone plate is in different angles fastens,Therefore first bone plate and the second bone plate do not have opposite the problem of swinging,The angle of engaging can be steadilyed maintain.一種骨固定裝置，包含一第一骨板、一第二骨板，及一連接該第一骨板與第二骨板的結合單元。該第一骨板包括一本體，及一自該本體向外延伸的延伸段，該第二骨板包括一本體，及一自該本體向外延伸的設置段，該結合單元包括一形成在該第一骨板之延伸段的第一結合部，及一形成在該第二骨板的設置段並能用於與該第一結合部相配合卡設的第二結合部，該結合單元使該第一骨板與第二骨板能呈不同角度相卡合，因此該第一骨板與第二骨板不會有相對擺動的問題，能穩固地保持卡合的角度。
