A quasi experimental one group pre-test and post-test research  was conducted to assess the effectiveness of education on activity and leisure time management on pain and functional ability among adults with knee osteoarthritis at Sri Venkateshwara medical college hospital and research centre. 30 males and females were selected with stratified random technique based on sampling criteria. Pain and functional ability were measured with Visual Analogue Scale (VAS) and Modified WOMAC scale respectively. Subjects were educated regarding activity and leisure management for 1week and observed for 4 weeks. At the end of fourth week Pain and functional ability were measured. Pre-test and post test pain score were analyzed using t test with mean and standard deviation of 4±1.13. t score of 19.883 signifies that education was effective at P<0.001 in reduction of pain. Functional ability mean score was 12.53± 6.458 with t value of 10.63 which is highly significant at P<0.001 at the fourth week. Pain score association with demographic and clinical variables using Chi-square test were not significant at P <0.05level. Hence, educational intervention was needed to enhance adherence with clinical management and promotion of flexion of knee among adults with Knee Osteoarthritis.