We report the case of a 26-year-old man who presented with a non-painful priapism with a history of 3 months permanent erection after suffering a perineal trauma. An arteriocorporal fistula with a turbulent flow between the right cavernosal artery and the corpus cavernosum, conclusive for a high-flow priapism was initially detected by colour Doppler ultrasound. A superselective embolization with Gelatin sponge was safe and effective to treat the high-flow priapism. The use of gelatin sponge resulted in a temporary embolization with long-term effect of penile detumescence and preservation of erectile function.