We report a case of sternal reconstruction using bilateral sternal bar turnover flaps in a 4-year-old boy with an inferior sternal cleft, as part of Cantrell's pentad. When the patient was 10 months old, he underwent sternal reconstruction using a resorbable poly-L-lactic-polyglycolic acid plate in the first stage when there was insufficient autogenous tissue to provide a reliable reconstruction. Bilateral sternal bar turnover was performed in the second stage at 4 years of age. This operative technique is described in this report. This novel technique provides a robust, dynamic, and reliable reconstruction for inferior sternal defects.