ABSTRACT
About some knee joint pains we treat at clinic every day, toward the old people who have been in knee joint pain for a long time, I considered about the alignment of lower extremity, and the connection between the mobility of patella and knee joint pains.<br>I had three kinds of ways to measure the alignment of lower extremity. F-T angle means degrees of genu-varum and genu-valgum about lower extremity. Q angle means the deviation of patella at the frontal plane. E angle means the extension limitted of the knee. I measured each angle. I examined the mobility of patella up and down, left and right. In addition, I selected two points from six points where knee joint pains often happened, after that I made these two points.<br>As a result, only the worse of F-T angle had an influence on the continuance of pains and mainly the pain place tended to gather in Nai-shitugan and Kyokusen. The change in Q angle and E angle didn't participate in a continuance of pains. I could suppose that the limitation about the mobility of patella also had an influence on the occurence of pains.