Kidney pathology is a common phenomenon which is revealed in patients with rheumatoid arthritis (RA). Its incidence is estimated at 50-60% of all patients. It is an important clinical problem because it directly affects the outcomes of RA. Changes in the kidneys may result directly from either the underlying illness or complications due to various, including iatrogenic causes. In the following paper we present actual views on the subject of the known up-to-date causes of renal impairment in the course of RA.