A sensing bone fixing element includes a fixing portion, a fastening portion, a capacitance structure and a coil. The fastening portion is fixed on the fixing portion and suitable for being fastened to a bone. The fastening portion passes through the capacitance structure which has a capacitance value and includes a first conductive layer, a second conductive layer and an elastic dielectric layer. The first conductive layer leans against the fixing portion, the second conductive layer leans against the bone and the elastic dielectric layer is located between the first conductive layer and the second conductive layer. The coil has an inductance value, and two ends of the coil respectively connect to the first conductive layer and the second conductive layer. The coil receives a detecting radio frequency (RF) signal and generates a responding RF signal according to the change of the capacitance value and the inductance value.一種感測式骨頭固定元件,包括一固定部、一鎖附部、一電容結構以及一線圈。鎖附部固定於固定部且適於鎖附於一骨頭內。鎖附部貫穿電容結構,而電容結構具有一電容值且包括一第一導電層、一第二導電層以及一彈性介電層。第一導電層抵接固定部,而第二導電層抵接骨頭,且彈性介電層位於第一導電層與第二導電層之間。線圈具有一電感值,且線圈的兩端分別連接第一導電層以及第二導電層。線圈接收一偵測射頻訊號後,依據電感值以及電容值的變化而產生一回應射頻訊號。10‧‧‧骨頭100a‧‧‧感測式骨頭固定元件110‧‧‧固定部120‧‧‧鎖附部130‧‧‧電容結構132‧‧‧第一導電層134‧‧‧第二導電層136‧‧‧彈性介電層140‧‧‧線圈D‧‧‧距離T、H‧‧‧厚度
