Caudal block has been evaluated clinicallyy from the material of anesthesia records in 1097 cases for anorecral, lower urinary tract and gynecologic surgery during the past 20 years(from Jan.1957 to Dec. 1967). We have assessed caudal block for age, sex, operation, failure rate, supplementay anesthesia and complications. The most frequent indication for caudal block was anorectal surgery(72.7%) followed by gynecologic and urologic surgery( respectively 25.65% and 1.7%). We failed in 5.9% of the cases which needed substitution with spinal anesthesia(90.7%), intraveneous or inhalation general anesthesia and epidural block. The incidence of complications was very low and the most common complication seen in this study was hypotension. However, there was no difficulty in treating complications symptomatically and there were no fatal cases.