A kind of operation auxiliary device of syringe, to one of one syringe of operation that assists user piston rod with respect to the movement of one of syringe syringe along the axial movement of the syringe. The operation auxiliary device of the syringe includes a pedestal, a movable member and a screw rod. Pedestal fixes what thereon with for syringe. Movable member be arranged what pedestal on, and can opposite base move along a straight line along a predetermined direction. Movable member fixes what thereon with for the piston rod. Screw rod spiral shell is worn pedestal and is rotatably connected on movable member. Screw rod can rotate under an external force, and movable member opposite base is driven to move along predetermined direction. The parallel what syringe of predetermined direction is axial, thereby drives piston rod with respect to syringe along its axial movement.一種注射器之操作輔助裝置，用以輔助使用者的操作一注射器之一活塞桿相對該注射器之一針筒運動沿該針筒之軸向運動。該注射器之操作輔助裝置包含一基座、一可動件，以及一螺桿。基座用以供針筒固定於其上。可動件設置於基座上，且可相對基座沿一預定方向直線運動。可動件用以供該活塞桿固定於其上。螺桿螺穿基座且可轉動地連接至可動件上。螺桿可在一外力作用下轉動，並且帶動可動件相對基座沿預定方向運動。預定方向平行於針筒之軸向，藉此帶動活塞桿相對針筒沿其軸向運動。
