The author report 2 cases of meconium peritonitis; One has 2 sites of perforation at terminal ileum without evidence of intestinal obstruction. The other was to proven the definite cause because of preoperative dead. The first case was dead postoperavely even though successful Mikulicz exteriorization was done. Mechanism of meconium peritonitis had been described by Morgagni in 1761, but mechanism were by meconium reaches the peritoneal cavity is something of a mystery. Usually rupture of intestinal wall may occur in association with obstruction, but has been shown that a ole may occur in the absence of obstruction. In our case 1, postmortem examination and surgical findings demonstrate the 2 perforation sits at 5, 10 cm respectively from the ileocecal valve at terminal ileum with meconium ileus. A complete explanation for this observaton is lacking, however author postulate that intestine may perforate as a result of vigorous peristalsis in fetus with meconium ileus, that pass the meconium into the peritoneal cavity with relieve the obstruction. Two of our cases have scattered peritoneal wall calcification at birth. Author report the two cases of rare meconium peritonitis to insist the early radiologic evaluation make the better survivals.