To determine the prevalence of urological and vascular complications in renal trans-plant recipients (RTx) at Tabriz Renal Transplant Center, we studied 55 recipients of renal allo-grafts (25 male and 29 female patients with a mean age of 38.3 +/- 13.4 years) from October 2005 to November 2006. The surgical complications in our study included hematomas: 20.4%, renal artery stenosis: 20.4%, calculi: 7.4%, hydronephrosis or ureteral stricture: 5.6%, urinary leakage: 5.6%, lymphoceles: 1.9%, and renal vein thrombosis: 1.9%. We conclude that the most common urologic complications in our center were ureteric strictures and urine leaks, and the most common vascular complication was renal artery stenosis.