A knee retractor according to an embodiment comprises: an upper frame, which is positioned on the thigh, and which has an upper retracting member provided on an end thereof； a lower frame, which is positioned on the lower leg region, and which has a lower retracting member provided on an end thereof so as to be able to engage with the upper retracting member and to rotate accordingly； and a band portion configured to surround the thigh and the lower leg region, the upper frame and the lower frame being mounted on the band portion, wherein contacting parts of the upper and lower retracting members can be positioned on the front side of the knee joint.
