To provide a knee supporter which is fitted on the knee by one touch and does not generate wrinkles or become bulky when the knee is bent to support bending and stretching of the knee joint and obtains a blood circulation accelerating effect and an insulation effectiveness caused by far infrared rays.

A belt-like body 6 with a length so as to be able to wind it around the knee is prepd. by using a sheet prepd. by baking a nylon fabric on one face of a thin layer article 1 made of a rubber as a raw material and the width C of the central part 6a of the belt-like body 6 is narrowed and an oblong cut channel 6b is provided at the central part. The both side end parts of this belt-like body 6 are divided into two up and down to respectively from them into tongue piece shapes and one group of Magic tapes (a registered trade mark) 7a is bonded on the tongue piece parts 6c and 6e of the one side and another group of the Magic tapes is bonded on the tongue piece parts 6d and 6f and a number of air vent holes 9 are distributed on the part except the tongue piece parts 6c-6f.