Endopyelotomy has developed from the advances of endourology and has become an accepted means to correct ureteropelvic junction obstruction. Endopyelotomy can be performed with less morbidity than pyeloplasty, with less operative and anesthetic time, less analgesic requirements, and a shorter recovery period. With success rates of 88.8 per cent for primary obstruction and 89 per cent for secondary obstruction, provided patients are selected appropriately, endopyelotomy has become a valuable procedure for the correction of ureteropelvic junction obstruction. The longest follow-up is 4 years, and therefore long-term success rates cannot be quoted. Time will reveal the ultimate place for endopyelotomy.