Objectives: Evaluated Outcomes of robot laparoscopic pyeloplasty in treatment of Ureteropelvic junction obstruction in children Methods: Assessed retrospectively, 30 patients were performed robot laparoscopic pyeloplasty in treatment of Ureteropelvic junction obstruction (UPJ) stenosis. All of them underwent ultrasound of kidney and diuretic isotopic renography to evaluate the degree of obstruction and impaired renal function.