Solitary fibrous tumor (SFT) of the kidney is rare. A 76-year-old woman was referred to our hospital with a complaint of an incidentaloma of the right kidney. Computed tomography revealed an ovoid, hypervascular tumor in the right kidney. Magnetic resonance imaging showed a low intensity tumor occupying the upper calyx of the right kidney (T2 weighted image). Laparoscopic right radical nephrectomy was performed. An immunohistochemical study using a monoclonal antibody directed against the human hematopoietic progenitor cell antigen (CD34) stain confirmed SFT. The follow up at 48 months after surgery showed no recurrence or distant metastasis.