We have experienced a patient, 16 year-old male, with ventricular septal defect with tricuspid recur- gitation due to blunt chest trauma. He suffered from congestive heart failure after the trauma. Echocardiogram and cardiac catheterization revealed left to right shunt at the ventricular level (muscu- far portion of interventricular septum) and tricuspid regurgitation. At the time of the operation, marked systolic thrill was palpable over the rlght ventricle near the apex and a chorda tendina was seen sharply ruptured just near the medial papillary muscle. We repaired the ventricular septal defect with a Dacron patch and chordal reconstruction with autologous pericardium. The postoperative course was uneventful and the patient was discharged in good condition.