PROBLEM TO BE SOLVED: To solve problems in a conventional knee supporter in which it is hard to operate a flexural operation because a kneecap is also covered, and the stability of walking operation is not obtained, and also it is not configured to cross over and fix an impeller member, so that a fixing force (support force) is weak generally and cannot firmly tighten a peroneal bone head in the outside of a knee and a thighbone inside lower end in the inside of the knee.SOLUTION: A knee supporter comprises a knee back covering part 1 comprising stretchable cloth sheets, and a material obtained by attaching two pieces of clamping impeller members 3 overlapped on the knee back covering part 1 at the left and right sides, respectively. The knee back covering part 1 has an area covering a knee back and a ligament part of both sides thereof in wearing. The impeller members 3 are provided to be partially overlapped from the side part of the knee back covering part 1 vertically to both sides. Further, the impeller members 3 attached to the left and right of the knee back covering part 1 are wound so as to cross such that the left top comes under the right and the left bottom comes on the right. Male members for attaching and detaching female materials 5 of planar fasteners for detachably fastening the tips of the impeller members 3 to each other are attached, respectively.
