Introduction: Diaphragmatic hernias occurring during pregnancy or during labor are very rare. This kind of injury or complication is mostly diagnosed with delay. Case report: A 30-year-old, primigravida woman presented an acute respiratory distress three weeks after childbirth by emergency caesarian section. The past history was uneventful till a car crash three years ago with whiplash injury without blunt abdominal trauma. The diagnostic of the dyspnea was assured by thorax CT scan. Symptoms of gastrointestinal obstruction were not recorded. An emergency thoracotomy was performed. The incarcerated gastric fundus had to be resected. The central diaphragmatic hernia could be closed by sutures. An abdominal approach was not necessary. The postoperative follow-up was uncomplicated. Discussion and Conclusion: Incarceration of abdominal viscera by diaphragmatic hernia is an uncommon cause of pleural empyema. Her happening during pregnancy or during the peri-partum period is increasingly rarely and represents a life-threatening event for the pregnant woman and her fetus. Early diagnosis and surgery in an emergency setting are required. Diagnose and treatment of diaphragmatic hernias in women in child-bearing age should happen before pregnancy in matter to avoid potential lethal complications for the expectant mother as well as for the fetus.