In this study, we are intending to compare two surgical methods (ESWL and TUL) for the treatment of pediatric lower ureteral stones. 50 children below the age of 13 years with lower urethral stones and without ureteral anomaly or untreated coagulopathy who were referred to Shahid Labbafinejad Hospital will participate in this study to undergo Extracorporeal Shockwave Lithotripsy or Transurethral Lithotripsy through a multicentre randomized clinical trial. We compare two interventions kinds of surgery regarding becoming stone-free (effective factors on the treatment outcome such as size, number, location, and density of stone), the need for repeating the treatment, rate of minor complications (including inserting ureteral stents, nephrostomy,….), the rate of minor surgical complications such as pain, hematuria, UTI, steinstrasse, and major complications (ureteral perforation, detachment or stenosis, septicemia, non-functional kidney), and the patient’s and family’s satisfaction. Patients are followed up through physical examination, IVP and sonography up to 3 months.