A knuckle fixation device includes a first fixing unit, a second fixing unit and at least one elastic member. The first fixing unit includes a first wearing body for the fingers to extend, and a first connecting plate extending on one side of the first wearing body and extending in a direction of penetration. The second fixing unit includes a second wearing body for the finger to extend, and a second connecting board extending from the second wearing body toward the first fixing unit and pivotally connected to the first connecting board, the first connecting board and the first connecting board The two webs are of a rigid structure. The two ends of the elastic member are respectively connected to the first fixing unit and the second fixing unit, and the elastic member can be bent and tends to return to a straight state extending in the first direction, so that the second fixing unit is pivoted relative to the first fixing unit After the rotation, the state is restored to the same direction as the first fixing unit in the extending direction.一種指關節固定裝置包含一第一固定單元、一第二固定單元及至少一彈性件。第一固定單元包括一供手指穿伸的第一穿戴體，及一位於第一穿戴體一側且沿一穿伸方向延伸的第一連結板。第二固定單元包括一供手指穿伸的第二穿戴體，及一由第二穿戴體朝第一固定單元方向延伸且樞接於第一連結板的第二連結板，第一連結板和第二連結板為硬質結構。彈性件的兩端分別連接第一固定單元及第二固定單元，彈性件可被彎折並趨於恢復至沿第一方向延伸的平直狀態，使第二固定單元相對於第一固定單元樞轉後恢復至與第一固定單元同樣沿穿伸方向延伸的狀態。
