Fournier's gsngrene is a rare disease involving the scrotum and the penis with occasional extension up to the abdominal wall. The etiology of the disease, commonly without prodromal symptoms and with sudden onset, is still not fully understood. The organisms are usually streptococcus haemoliticus and/or anerobic bacteria. We report a case of Fournier's gangrene, presenting septic shock. The patient was treated with reanimatory care, antibiotics, local excision and debridment. Speaking about anatomical and etiopathogenetic hypotheses, we discuss the diagnostic problems and the treatment of the disease. We emphasize the role of the early diagnosis.