A radiological and clinical observation was made on 77 cases of benign prostatic hyperplasia admitted to thedepartment of Urology, Cho-Sun University Hospital during the period from Jan. 1972 to Dec. 1979 and followingresuls were obtained. 1. Incidence of PBH was 8.1% to 953 total inpatients, 11.3% to 679 male inpatients, and 34.5% to male inpatients of 50 years more. 2. Majority of cases was found in 7th and 8th decades (80.5%) with meanage of 69.4 years old. 3. A gradual tendency of annual increase of the cases was observed and the mean intervalelapsed from initial symptoms to visit was 29.9 months. Common symptoms were dysuria in 72 cases (93.5%),hematuria in 53 cases (68.8%), frequency in 51 cases (66.2%) and 12 cases (15.6%) were acute urinary retention. 4.I.V.P. findings of BPH were elevation of the bladder base in 71 cases (92.2%), trabeculation of the bladder wall i58 cases (75.3%), hypertorphy of the bladder in 24 cases (31.2%) and the complications-hydronephrosis &hydroureter 16 case (20.8%), bladder diverticula 9 cases(11.7%) and bladder stone were 5 cases (6.5%). 5.Cystourethrographic findings of the posterior urethra with 33 cases of PBH were smooth, gentle sloping in 28 cases(84.8%), widening in sagittal plane in 23 cases (69.7%), elongation & narrowing of the urethra in 26 cases(78.8%).