A clinical and radiological observation was made on 62 cases or urinary tract injury in the Dept. of Urology, Chosun University Hospital during the period from January 1979 to December 1983. The results were as follows: 1. Age distribution of the lower urinary tract injury was the highest in the age 41 to 50 (30.6%). The sex ratio, male to female was 6.8:1. 2. The most common cause of the L.U.T.I. was traffic accident in 23 cases (37.1%) and others are fall down in 15 cases (24.2%), lunt trauma in 13 cases (21.0%), saddle injury in 8 cases (12.9%) 3. The radiological finding of the bladder injury shows intraperitoneal extravasation in 11 cases (64.7%), extraperitoneal extravasation in 5 cases (29.4%) and deformity of bladder in 12 cases (70.6%) 4. The radiological finding of the urethral injury shows extravasation of contrast media in 44 cases (97.8%), venous intravasation in 11 cases (24.4%) penile and scrotal hematoma in 3 cases (6.7%) 5. The common site of the urethral injury was bulbous portion 25 cases (56.8%) membranous portion in 16 cases (36.4%) bulbomembranous portion in 2 cases (4.5%) and penile urethra in 1 case (2.3%) 6. The L.U.T.I was associated with pelvic bone fracture in 33 cases (53.2%) esp. pubic bone fracture in 24 cases (38.7%) 7. The complication of the L.U.T.I. was urethral stricture in 24 cases (38.7%), fistula formation in 3 cases (4.8%) incontinence in 2 cases (3.2%)