This observational study will evaluate in clinical practice the change in Disease Activity Score (DAS28) in patients with rheumatoid arthritis and an inadequate response to DMARDs who are initiated on treatment with RoActemra/Actemra (tocilizumab). Data will be collected from eligible patients (on 8 mg/kg or 4 mg/kg intravenously every 4 weeks, with or without methotrexate) for 12 months.