Fifty patients between the ages of 8 and 18, diagnosed with oligoarticular, polyarticular and systemic subtypes of juvenile idiopathic arthritis (JIA) were included in this study to establish whether or not Pilates is a beneficial exercise program for young patients with JIA. Patients were randomized to participate in 50 minutes of conventional exercise therapy or Pilates, twice a week for 6 months. Physical and psychological aspects according to PEDsQL, pain, functional ability, range of motion were all improved in Pilates patients and results were significantly better than those who participated in conventional therapy.