Provided is a knee joint supporter which can improve the stability of the knee joint, reduce the wearer's fatigue and reduce the load on the patellar tendon. The knee joint supporter (10) comprises a first anchor section (2) formed by wrapping one end of a tubular knitted fabric around the wearer's thigh to tighten said part with the tubular knitted fabric, a second anchor section (3) formed by wrapping the other end of the tubular knitted fabric around the wearer's lower thigh to tighten said part with the tubular knitted fabric, and a substantially U-shaped knitted supporting section (4) being joined to the first anchor section (2), covering the wearer's patella region and thus supporting the wearer's patella, wherein the stretch resistances, in the circumferential direction of the tubular knitted fabric, of the first anchor part (2) and the second anchor part (3) are larger than the stretch resistance, in the circumferential direction of the tubular knitted fabric, of a base fabric section (1), and the stretch resistance, in the length width direction (L) of the tubular knitted fabric, of the supporting section (4) is larger than the the stretch resistance, in the length width direction (L) of the tubular knitted fabric, of the base fabric section (1).本發明之課題在於提供一種可提高膝關節之穩定性，減少穿著者之疲勞，同時減少對膝蓋腱之負荷之膝關節支撐帶。膝關節支撐帶10具備：第1固著部2，其係環繞筒狀織物之一端而編成，且使該筒狀織物束緊於穿著者之大腿；第2固著部3，其係環繞筒狀織物之另一端而編成，且使該筒狀織物束緊於穿著者之小腿；及支持部4，其連結於第1固著部2，以包圍穿著者之膝蓋骨所對應之部分而編成大致U字形狀，支持該穿著者之膝蓋骨；且第1固著部2及第2固著部3於筒狀織物之圓周方向上之伸縮阻力，大於基底布料部1於筒狀織物之圓周方向上之伸縮阻力，支持部4於筒狀織物之長度方向L上之伸縮阻力，大於基底布料部1於筒狀織物之長度方向L上之伸縮阻力。
