We report a case of a 59-year-old woman who presented with gross hematuria due to development of a pseudoaneurysm that was diagnosed using Doppler ultrasonography 16 days after retroperitoneoscopic partial nephrectomy for renal cell carcinoma. Hematuria resolved after the patient was treated with selective angioembolization of the pseudoaneurysm. There has been no recurrence of the pseudoaneurysm for 28 months after the procedure.