To provide a knee supporter which supports the movement of a knee when worn and further has a magnetic treatment effect.SOLUTION: Expandable materials 2 to 5 are arranged at the upper part, the middle part and the lower part of the front part of the tubular base cloth 1, as well as on the back part, and all or one of the stretchable materials 2 to 5 A large number of magnets 6 are provided. For example, the magnet 6 is disposed on the stretchable materials 2, 4, 5 other than the stretchable material 3 at the front middle portion. The stretchable material 5 on the back side has a spindle shape of a size ranging from the upper end portion to the lower end portion.(FIG.【課題】装着時に膝の動きをサポートし、さらに磁気治療効果を備えた膝サポーターを提供することを課題とする。【解決手段】筒状の基布1の正面部の上部、中間部、下部の3か所並びに背面部に伸縮性素材2~5を配し、その伸縮性素材2~5部分のすべて又は一部に多数のマグネット6を備え付ける。例えば、マグネット6は、正面中間部の伸縮性素材3以外の伸縮性素材2、4、5に配設する。背面部の伸縮性素材5は、上端部から下端部に至るサイズの紡錘形とする。【選択図】図3