Background: Preliminary study of the results of urolithiasis treatment by extracorporeal shockwave lithotripsy at An Giang Hospital. Patients and methods: The prospective study was carried out on 136 patients (142 cases) with urolithiasis treated by ESWL at An Giang Hospital from January 2008 to June 2009.Results: Gender: 77 males, 59 females; mean age: 45 (17 - 78); 76 renal stone cases (53.5%) and 66 ureteral stone cases (46.5%).