Kienbock's disease is the osteonecrosis of lunate bone. Patients usually present with unilateral localized dorsal wrist swelling and pain that increase with movement. Direct radiographic and other imaging methods are used for diagnosis. Cautious evaluation of the radiological findings is substantial, because the management of the disease depends on radiological stage. Here, we present a 46-year-old woman with rheumatoid arthritis who admitted to the outpatient clinic of our hospital, because of pain, swelling and limitation of movement in the left wrist. We want to draw attention Kienbock's disease in patient with rheumatoid arthritis.