Knee osteoarthritis is one of the most common joint disorders and a major cause of disability and disability in old age. Although previous research has shown the positive effects of exercise on land to some extent, but due to high pressure on land, the elderly does not want to participate in these exercises. Water exercise has recently been considered to reduce pain in patients with osteoarthritis of the knee, although its effects have not yet been fully elucidated. So, the objective of this study was to investigate the effect of a water jogging training program on the symptoms of knee osteoarthritis in elderly men. 15 elderly men with knee osteoarthritis were purposefully selected as subjects. We used global questionnaire of the consequences of knee injuries and osteoarthritis (KOOS) to collect data. The subjects performed a jogging in water program for 10 weeks under the supervision of a hydrotherapy instructor level. Correlated t-test was used to analyze the data at the significance level (P<0.05). Between pre-test and post-test, the mean symptoms (P=0.033), knee pain (P=0.024), motor function in daily activities (P=0.014), motor function in recreational sports activities (P=0.006) and Quality of life (P=0.005) was significantly different after the program. The results of this study show that regular practice of jogging in water can be a new, safe, effective and low-cost way to improve pain and quality of life in people with knee osteoarthritis. These exercises may reduce the need for surgery and knee replacement in patients with knee arthritis.