ESWL is a non invasive method for treatment of renal and ureteral stones. This method offers the advantage that all radiopositive renal stones irrespectively of their actual location in the collecting system and the free parts of the ureter can be localized and treated. Between March 1985 and December 1986 in 14 children, aged 2 to 14 years, with renal and ureteral calculi this method was performed. Further should be referred to the fact that two children with complete staghorn calculi were successfully treated by ESWL monotherapy. There was no morbidity and no undue side effects. 12/14 children (= 85%) were free of stones within the first three months following ESWL.