During the period of 4 years form July, 1976 to June, 1980 the radiological and clinical evaluation had beenmade on 102 patients suffered from lower urinary tract injuries which were confirmed by the radiologicalexamination and operation. The resuls were as follows; 1. Age distribution of the total 102 patients (87 males and15 females) was broad from 4 to 72 years. And most of the patient were in the age group of 20 to 49 years. 2. Themost common cause of injury was traffic accident (67.6%), next blunt trauma, saddle injury, fall downrespectively. 3. 46 patients of bladder injury were as follows: intraperitoneal rupture in 17, extraperitonealrupture in 12, and contusion in 14. 4. 74 patients of urethral injury were as follows; membranous portion in 37,bulbous portion in 31, prostatic portion in 3, and penile portion in 2. Most of the cases showed extravasation ofcontrast media. 12 cases showed extravasation with venous intravasation. 5. Contusion or extraperitoneal ruptureof hte bladder, membranous urethral injury, and concommitent bladder and urethral ruptures were frequentlyassociated with pelvic bone fracture, Intraperitoneal ruptures of the bladder and solitary ruptures of the bulbousurethra were infrequently associated with pelvic bone fracture. 6. Late sequelae of the lower urinary tract injurywere stricture, fistula and stone formation.