Osteoarthritis is a degenerative health disorder characterized by stiffness and inflammation of the joints, characterized by damage to the cartilage, which can cause pain in the joints of the hands, neck, back, lower body, back and often the knee joints. Pain in genuine osteoarthritis can last a long time causing limitations in the ability to function functional activities. One non-pharmacological method is kinetic chain exercise. This study aims to determine the comparison of close kinetic chain exercise and open kinetic chain exercise after giving infrared to increase functional ability in conditions of primary genu osteoarthritis. This research uses a quasi experimental design with a pre and post test two group design approach. The sample for this research was 30 respondents. 15 respondents were treated with close kinetic chain exercise after giving infrared and 15 respondents were treated with open kinetic chain exercise after giving infrared. There is an effect of close kinetic chain exercise after administering infrared on increasing functional ability in primary genu osteoarthritis conditions at Bhayangkara Kediri Hospitalwith a significance of 0.001< α (α=0.05).There is an effect of open kinetic chain exercise after administering infrared on improving functional abilities in primary genu osteoarthritis conditions at Bhayangkara Kediri Hospital with a significance of 0.006< α (α=0.05).There is a difference in the effect of close kinetic chain exercise after giving infrared and open kinetic chain exercise after giving infrared on increasing functional ability in primary genu osteoarthritis conditions at Bhayangkara Kediri Hospital with a significance value of 0.035< α (α=0.05). Close kinetic chain exercise after giving infra red is more effective than open kinetic chain exercise after giving infra red in improving the ability of primary genu osteoarthritis conditions at Bhayangkara Kediri Hospital in 2023.