Background: This study focused on evaluates the effect of fasting on ureteric stone passage. Methods: Two groups of patients with the ureteric stone of 5 mm to 9 mm in Extracorporeal Shock Wave Lithotripsy (ESWL) in Kidney Stones Unit in medical Alsader city are compared. Each group has 100 patients fasting and non-fasting. Results: The results are found that the stones are passing lower ureter for the fasting group (43%) more than non-fasting groups (21%). Conclusion: The stone passage down the ureter is more in fasting patient than non-fasting. However, as full of the ureter with fluid, the movement will be more difficult than if it was empty that meaning interior walls do not shrink because of an obstruction of the liquid inside the ureter.