Abdominal aortic aneurysm is extremely rare in infant and is generally due to infection, umbilical artery catheterization, vasculitis, connective tissue diseases and tuberous sclerosis. At the absence of these evident causes, it is a congenital primary aortic aneurysm which is exceedingly rare and only a few cases have of which have been reported. Here we report two cases of aortic wall reconstruction done by a Gore tex patch. The immediate result is excellent with a reestablishment of the femoral pulse and an excellent Doppler control. The problem which we may face in the future is probably the aortic out come with this Gore tex patch a continaons follow up of these patients is necessary.