The total knee arthroplasty (TKA) is now an established treatment of severe arthritis of the knee joint. The results of TKA estimate good result in mid-90% of patient. But most of assessing method was based on the evaluation methods, made by surgeons, so the patients own evaluation of success may different from the assessment of the surgeons. Especially the Korean life style is different from western style because Korean need more flexed knees for sitting position on the floor. But there no paper about patient subjective satisfactory result of Korean in the authors knowledge. So we studied the satisfactory degree about the outcome of TKA in Korean by the survey. A total 90 patients (103 cases), had undergone TKA were asked to complete a questionnaire-the questionnaire composed of question; "are you satisfactory with operation?"and the answer; "very satifactory, generally satisfactory, improved, no change or aggravated-about their satisfaction with the outcome of surgery". The results were as follows; 1.Of 90 patients, 90.3% were satisfied with the outcome of TKA. 2. The patints were satisfied 100% in avascular necrosis of femoral condyle, 83.8% in degenerative osteoarthritis, and 93.6% in rheumatoid arthritis. 3. The satisfactory degree had no relations with age, prevalent period, bilaterality and the evaluation period after the TKA (P>0.05). 4. There was a significant difference in knee scores between the patients who satisfied or not (P<0.05) and the satisfactory degree had a correlation with the points of knee score and amelioration rate of knee and function scores.