Diaphragmatic eventration is an abnormally elevated hemidiaphragm in thoracic cavity with poorly developed musculature. This condition can lead to abnormal displacement of intra-abdominal organs. It usually remains asymptomatic in early life. It presents later with respiratory and occasionally gastrointestinal complications. A clinical case of eventration of diaphragm, displacement of the splenic flexure of colon, omentum and spleen into thoracic cavity with gastric volvulus is uncommon. Gastric volvulus occurs when the stomach twists around one of its axis. It is commonly along its long axis (organoaxial volvulus) and less commonly along the vertical axis (mesenteroaxial).Mortality rate of gastric volvulus range from 30%-50%. Hence early diagnosis and prompt intervention prevents development of necrosis and perforation of stomach. We report a case of 30year old male having left sided diaphragmatic eventration associated with organoaxial gastric volvulus and displaced intra-abdominal organs treated with successful surgical intervention. Key words: Eventration; Diaphragm; Gastric; Volvulus; Malrotation; Organo-axial; Mesenteroaxial, Gastric outlet obstruction, Derotation; Gastropexy.