Introduction: Judo, is a primarily a sport. The objective is to master the opponent. This is mainly done by applying pressure to arm joints or to the neck to cause the opponent to yield. This format of play leads to a ligament tear due to a direct blow to the knee, either from a fellow athlete or the judo mats. Injuries mainly occur due to a poorly executed throw or bad falling technique. The knee usually buckles and pain is severe. This knee injury affects the players badly. Objectives: To find the percentage of knee injury and affection on functional status and quality of life of judokas. Methods: Based on inclusion and exclusion criteria 100 subjects were enrolled for the study of purposive sampling. Judokas filled the set of questionnaire about knee injury and osteoarthritis outcome score. Results: Data was meaningfully assorted through calculation of mean, median and standard deviation. Value of mean is 55.48, median is 56 and standard deviation is 26.976. Conclusion: The conclusion of the study is that 51% of the players have mild effect on their functional status and quality of life due to knee injury during their practice session followed by moderate 45% and only 4% of population has severe effect on their functional status and quality of life during and after their practice sessions.