This knee supporter is provided with a cylindrical supporter body that includes a knee front surface part (A), a knee rear surface part (B), a thigh side/front surface part (C), a thigh side/rear surface part (D), a shin side/front surface part (E), and a shin side/rear surface part (F), the modulus of elasticity in the axial direction at 80% elongation in the axial direction of the cylindrical supporter main body satisfying the equations (1) (3) below. 0.7 = knee rear surface part (B)/knee front surface part (A) Equation (1) 1 <； thigh side/front surface part (C)/thigh side/rear surface part (D) Equation (2) 1 <； shin side/front surface part (E)/shin side/rear surface part (F) Equation (3)
