Acinetobacter baumannii is a prolific nosocomial pathogen renowned for its multidrug-resistant nature. However, A.聽baumannii is a rare cause of nosocomial meningitis, and is an even rarer cause of meningitis outbreaks in neurosurgical units. We report a case of nosocomial meningitis due to multidrug resistant A.聽baumannii in a postoperative neurosurgery. The diagnosis was retained on a beam of arguments clinical, biochemical and bacteriological. The evolution was unfavourable, and the patient died of multiple complications.