Objectives : To research trends of studies on treatments of knee osteoarthritis in Korean medicine. Methods : Domestic theses, published from 2000 to 2010, mentioning the treatments of knee osteoarthritis in Korean medicine were reviewed and analyzed. This study researched 79 theses and classified again according to the fields of the treatment. Results : The results were obtained as below ; 1. Studies on pharmacoacupuncture account for 41% of the total (32cases/79cases). The target of treatments had changed from pain alleviation and anti-inflammation to cartilage-protection since 2006. 2. Herbal Drug, Bee Venom, Cervi Cornu Parvum pharmacoacupuncture, Taping Therapy and Tai-Chi Exercise program were more effective than others. Moreover research on exercise program such as Tai-Chi has been increasing. 3. Some Herbal Drug (Glycyrrhizae Radix, Angelicae Gigantis Radix, Achyrantis Radix, Paeoniae Radix, Eucommiae Cortex and so on) were mainly used to investigate the effect on cartilage protection, pain relief and anti-inflammation in laboratory test. 4. Acupuncture including individualized, local acupoints and constitution acupuncture were effective than others in pain alleviation and symptom relief. 5. Pharmacoacupuncture Bee Venom were effective in recovery of joint function and pain relief while Buthus martensii Karsch, Homnis Placenta and Cervi Cornu Parvum were effective in cartilage protection and recovery. 6. Moxibustion was efficient to reduce joint pain and partly increase ROM (range of motion) of knee joint, but was not efficient to recover the function of knee joint. Conclusions : These results indicate that research trends on knee osteoarthritis were changed from symptomatic treatment (pain alleviation and anti-inflammation) to conservative treatment (cartilage protection and recovery).