Bifurcation aortography and selective internal pudendal arteriography were performed in 70 impotent men under the impression of vasculogenic impotence. Age range was 6 to 63 years old (average 32). 54 patients had the history of pelvic trauma. The studies were performed under local and simultaneous intracavernosal and intraarterial Papaverine injection before filming. To reduce pain and arterial spasm, intraarterial Lidocaine and low osmolarity non-ionic constrast media were used. Arterial lesions were found in 50(93%) traumatic patients and 7(44%) non-traumatic patients. Internal iliac arterial lesion that causing pelvicsteal syndrome was noted in 3 traumatic patients. Among trauma related cases there were bilateral arterial lesion in 19 patients and one axis lesion in 31 patients respectively. among 16 non-traumatic patients there were bilateral arterial lesions in 2 patients and unilateral leison in 5 patients. Irrespective of bilaterality or unilaterality of the lesion, m jority of arterial lesions were fund at the distal internal pudendal artery or common penile artery level in traumatic patients. On the contrary, penile branch leison was predominant site in nontraumatic patients. With the improved arteriographic technique, selective penile arteriography appears accurate method in the diagnosis of arterial impotence.