Fournier's gangrene is a rare disease characterized by an aggressive necrotizing fascitis of perineum and genitalia which is caused by mixed bacterial infection. The cornerstone of therapy consists of immediate recognition, wide debridement of devitalized tissues, antibiotic therapy, search for the primary source and occasionally urinary and fecal diversion. Although Fournier's gangrene has been reported in almost all ages, most cases have been reported in adults and occurrence in children is very unusual. Despite advancement in management, morbility and mortality remain significantly high. We report a case of Fournier's gangrene in a boy of 3 years old preceded by diarrhea and upper respiratory tract infection.