Juvenile chronic arthritis is the most common connective tissue disease in children. It is of great social and clinical interest for its chronicity, for the often unpredictable response to pharmacological treatment; for the spontaneous evolution toward infirmity and often blindness. The English classification of the disease is here been adopted. There are 3 different types of onset: systemic, poliarticular and pauciarticular. Large joints such as the knees, wrists and ankles are involved more often than small joints. Also the cervical spine is frequently affected. Systemic disease is accompanied by high spiking fever, rash, lynphoadenopathy, pericarditis and hepatosplenomegaly. Chronic uveitis is a feature of JCA, more frequently observed in pauciarticular than in the other types of onset, and it is almost always associated with antinuclear antibody seropositivity. Rheumatoid factor (RF) and subcutaneous nodules are unusual in JCA. Diagnosis is often not easy and it is essentially clinical. The diagnostic criteria adopted have been proposed by ARA in 1977. In the majority of children treatment with ASA is successful. Sometimes other types of more toxic drugs such as gold salts or penicillamine are needed. Their use is best confined to reference centers. Orthopedical and physiotherapic treatments are complementary to the pharmacological one. Multidisciplinary centers are therefore necessary for the total management of these children also to stress the importance of furthering physical and psychological growth.