Although diaphragmatic eventration in newborn infants is generally regarded as a rare condition, the need for accurate diagnosis and appropriate intervention according to the etiological factors is well known. Recently the authors experienced five consecutive cases of diaphragmatic eventration below the age of two months(one to 55 days) requiring surgery. All were in males, and were left sided. Respiratory symptoms were present in 4 patients, and one patient showed inability to gain weight. Diaphragms were elevated to the level of the third to fifth intercostal spaces. Diaphragmatic plication through the abdomen gave excellent results. There was no postoperative mortality.