We present our experience of primary surgical closure of largeventricular septal defects in children less than 5 kg. Forty six childrenmet  ourcriteria for inclusion. Patients had no major extra cardiac disease. There were 2 early deaths and 2 late deaths in the study group. No patient was subjected to a second vsd surgery and patients did not require anticongestive therapies for prolonged period. Our results proved that primary closure of vsd can be done in children less than 5 kg with less mortality rates and less serious complications in post operative period. Pulmonary artery banding and prolonged medical therapy is not necessary.