Diaphragmatic injuries are quite uncommon and often result from either blunt or penetrating trauma. Diaphragmatic ruptures are usually associated with abdominal trauma; however, it can occur in isolation. Acute traumatic rupture of the diaphragm may go unnoticed and there is often a delay between the injury and the diagnosis. Patients present with non-specific symptoms and may complain of chest pain, abdominal pain, dyspnoea, tachypnoea and cough, heartburn and symptoms of gastro-oesophageal reflux. Respiratory distress and faeco-pneumothorax have been reported. We present an interesting case of traumatic diaphragmatic hernia presenting 5 years after a road traffic accident as acute abdomen and massive haematemesis due to strangulated gangrenous gastric hernia.