Inclusion Criteria: - Subjects must be diagnosed with RA as guided by ACR criteria - Subjects must have an inadequate response to methotrexate alone - Subjects must receive concomitant treatment with methotrexate during the study period - Before any study specific procedure, the subject must give informed consent for participation in the study Exclusion Criteria: - Subject has previous experience using SimpleJectTM - Prior treatment with Kineret® and/or etanercept - Less than 6 weeks wash-out period for patients receiving prior infliximab treatment - Subject is currently enrolled in other clinical trial, is receiving other investigational agent(s), or at least a 30 day period has not elapsed since completion of other investigational trials with device(s) or drug(s) - Subject currently has an infection requiring systemic anti-infective therapy - Baseline neutropenia (less than 1.5 x 10^9/l) - Subjects with severe renal impairment (CLCR less than 30 ml/minute) - Subjects not willing to use adequate birth control methods - Women of childbearing potential who are pregnant, are breast-feeding or plan on becoming pregnant during the study - Planned administration of live vaccines during study period - Subject is not available for follow-up assessments - Subjects with a known sensitivity to Kineret® or any of the excipients of E. coli derived proteins - Pre-existing malignancies - Any other condition that in the investigators opinion would preclude the subject from participating