Disclosed herein is an in vivofixation device. The fixation device has a band and a base coupled with the band. The band has a head end and a tail end, wherein the tail end has a hook. The band has a plurality of first teeth. The base is coupled with the head end of the band, and the included angle between the base and the band ranges from 100-170 degrees. Moreover, the base has a through hole and at least one second tooth, wherein the through hole is configured to receive the band. The second tooth is disposed within the through holeand is configured to engage with the first teeth.在此揭示一種體內固定裝置，包含一帶狀本體和一槽座本體彼此耦接。所述帶狀本體，具有一上端和一下端，其下端呈勾狀，且帶狀本體的一側具有複數個第一卡齒。所述槽座本體與帶狀本體的上端相耦接，且與帶狀本體之間形成一約100-170度之夾角。再者，所述槽座本體在結構上具有一穿孔和至少一第二卡齒，其中所述穿孔貫穿槽座本體，用以供帶狀本體穿過；所述第二卡齒位於該穿孔內，用以與第一卡齒相卡合。
