Urethral fistula is a very rare complication of Fournier’s gangrene. A persistently discharging penile sinus should prompt physicians to consider this unusual entity. To our knowledge, only two similar cases have been reported in the literature. Preoperative multidetector computed tomography (MDCT) images were not used to show the route of fistula in either of them, but the route was discovered during surgery. Here, we report a rare case of a 43-year-old, otherwise healthy, man who developed a ventral side urethral fistula as a result of Fournier’s gangrene found in preoperative images. Reconstructed images proved to be a valuable tool to highlight the path and extent of this unusual complication of Fournier’s gangrene before surgery.