A knee joint assisting device of the present invention comprises: a thighbone side frame having a plurality of thighbone-fixing through-holes formed in one side thereof and having a rotary center through-hole formed in the other side thereof a coupling means having a rotary center through-hole formed in one side thereof to correspond to the rotary center through-hole of the thighbone side frame and having a coupling unit formed in the other side thereof a shinbone side frame having a coupling unit formed in one side thereof to correspond to the coupling unit of the coupling means and having a plurality of shinbone-fixing through-holes formed in the other side thereof a coupling member for coupling the thighbone side frame and coupling means to be able to be rotated by passing the same through the rotary center through-hole of the thighbone side frame and the rotary center through-hole of the coupling means a plurality of assembling means for fixing the thighbone side frame and the shinbone side frame respectively to the thighbone and the shinbone and a combining means for combining the coupling unit of the coupling means and the coupling unit of the shinbone side frame. By using the knee joint assisting device of the present invention, the frames of the knee joint assisting device can be adhered and mounted on the adhesion surface of the thighbone and the adhesion surface of the shinbone even when the adhesion surface of the thighbone and the adhesion surface of the shinbone are not horizontal with respect to each other. Even when the assisting device adhesion surface of the thighbone and the assisting device adhesion surface of the shinbone are not disposed on the same plane because the shapes of the thighbone and the shinbone are abnormal, the frames of the knee joint assisting device can be adhered on the thighbone and the shinbone to allow normal joint motions and share a body load at the same time.COPYRIGHT KIPO 2015본 발명의 무릎관절 보조기구는, 일측에 복수의 대퇴골 고정용 관통구멍이 형성되며,
