A surgical torque screwdriver is provided. The surgical torque screwdriver includes a hollow body, an upper cover, a bottom cover, a driver head, an adjustable member, a top ball, a top member, an elastic member, a bottom member, a bottom ball and a clutch unit. The clutch unit includes a driving block, a linking-up block and a plurality of linking-up balls. The linking-up block includes a tooth disc and a linking base. The upper cover and the bottom cover close both ends of the hollow body individually. The driver head connects to the linking base. Both ends of the elastic member push the adjustable member and the clutch unit individually by the top member and the bottom member and consequently the elastic member offer a predetermined torque.一種醫療用扭力起子。扭力起子包含中空本體、上蓋、下蓋、工作桿、調整件、頂部滾珠、頂抵件、彈性件、底抵件、底部滾珠以及離合單元。離合單元包含導動塊、連動塊及連動珠,且連動塊具有齒盤及連接座。上蓋及下蓋分別封閉中空本體的兩端,且工作桿定位於連接座。彈性件之兩端分別藉頂抵件及底抵件抵靠調整件及離合單元,並提供一預定扭力值。100‧‧‧醫療用扭力起子110‧‧‧中空本體120‧‧‧上蓋130‧‧‧下蓋210‧‧‧調整件220‧‧‧頂抵件230‧‧‧頂部滾珠280‧‧‧工作桿310‧‧‧插銷320、330‧‧‧密封件240‧‧‧離合單元241‧‧‧導動塊242‧‧‧連動塊242A‧‧‧齒盤242a‧‧‧棘齒a1‧‧‧第一凸塊a2‧‧‧第二凸塊243‧‧‧連動珠250‧‧‧底抵件260‧‧‧底部滾珠270‧‧‧彈性件
