Double outlet left ventricle (DOLV), even defined as origins or both grast vessels from left ventricle, implies varieties of morphology in concern with loop pattern, location of ventricular septal defect, conotruncal anatomy, and presence or adsence of pulmonary stenosis. With the inprovement of surgical technique, corrective surgery of DOLV became possible, and preoperative diagnosis and determination of the accurate anatomical relatiohship between great vessels, ventricular septal defect, and ventricles is very important in surgical implication. Authors have recently experienced two cases of DOLV. The one is with subpulmonic conus, subpulmonic ventricular septal defect, patent ductus arteriousus, and preductal type coarctation of aorta. The other is with bilateral coni and subaortic ventricular septal defect. Loop patterns are [S,D,D] in both cases.