A radiological and clinical observation was made on 77 cases of benign prostatic hyperplasia admitted to the department of Urology, Cho-Sun University Hospital during the period form January 1972 to December 1979 and following results were obtained. 1. Incidence of PBH was 8.1% to 953 total inpatient , 11.3% to 679 male inpatients, and 34.5% to male inpatients of 50 years more. 2. Majority of cases found in 7th and 8th decades(80.5%) with mean age of 69.4%years old. 3. A gradual tendency of annual increase of the cases was observed and the mean interval elapsed form 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 in 58 cases (75.3%), hypertrophy of the baldder in 24 cases (31.2%) and the complications-hydrone- hrosis & hydroureter 16 cases (20.8%), bladder diverticula 9 cases (11.7%) and bladder stone were 5 cases(6.5%). 5. Cystourethrographic findings of the posterior urethral with 33 cases of PBH were smooth, gentle sloping in 28 cases ( 84.8%), widening in sagittal plane in 23 cases (69.7%), elongaton & narrowing of the urethra in 26 cases (78.8%).