In recent years a new nomenclature and classification childhood chronic arthritis has been introduced. The terms juvenile chronic arthritis and juvenile rheumatoid arthritis--have been replaced by juvenile idiopathic arthritis (JIA). The term JIA was adapted to indicate a childhood onset (before the 16th. birthday) characterized primarily by arthritis lasting for at least 6 weeks, and the cause haven't been found so far. In this paper the diagnosis and clinical course systemic arthritis, polyarthritis and oligoarthritis were characterized. The current therapeutic approach to JIA consists a complex management as the administration of antiinflammatory, immunosuppressive and immunomodulatory drugs--as well as rehabilitation.