Observational Study of Synovian® Inj. in Patients With Osteoarthritis in the Knee

Inclusion Criteria: * Adult male or female patient of over 19 years of age * A patient diagnosed with knee osteoarthritis * A patient who has been informed of the purpose, method of the study and signed the written informed consent form. Exclusion Criteria: * A patient who shows hypersensitive reaction to the Synovian® Inj. or to the ingredients of Synovian® Inj. * A patient with infection at the joint * A patient with skin infection or skin disease at the injection area * A patient diagnosed with osteoarthritis with the Kellgren \& Lawrence Grade IV in X-ray within 12 months before enrollment of this study.