A knee supporter, including a tubular supporter main body including: a knee anterior surface part (A)； a knee posterior surface part (B)； a femoral side anterior surface part (C)； a femoral side posterior surface part (D)； a tibial side anterior surface part (E)； and a tibial side posterior surface part (F), wherein elastic moduli, in an axial direction of the tubular supporter main body, when stretched by 80% in the axial direction of the tubular supporter main body, satisfy the following Formulae (1) to (3): Formula (1): 0.7 ‰¤ knee posterior surface part (B) / knee anterior surface part (A)； Formula (2): 1 <； femoral side anterior surface part (C) / femoral side posterior surface part (D)； and Formula (3): 1 <； tibial side anterior surface part (E) / tibial side posterior surface part (F).
