A femur supporting device is presented to improve the effect of dispersing sustained force of prior femur supporting device. This femur supporting device includes a femur stem with several inclined passageways; several supporting rods penetrates through the inclined passageways individually, with each supporting rod has a first connecting end and a second connecting end at two ends; a trochanter head with several first connecting portions to connect with the first connecting end of the supporting rods; and a fixing assembly with several second connecting portions to connect with the second connecting end of the supporting rods.一種股骨支撐裝置,用以解決習知股骨支撐裝置難以分散受力的問題。本發明的股骨支撐裝置包含:一股骨柄,設有數個斜通道;數個支撐桿,分別貫穿該數個斜通道,各該支撐桿的二端分別為一第一結合端及一第二結合端;一轉子頭,設有數個第一結合部供該支撐桿的第一結合端結合;及一固定組件,設有數個第二結合部供該支撐桿的第二結合端結合。