A congenital diverticulum of the ventricle is a very rare cardiac lesion which is almost always associated with additional cardiovascular anomalies. In the majority of cases a diverticulum of the heart has been diagnosed during cardiac catheterization for evaluation of additional cardiovascular anomalies. We report noninvasive echocardiographic diagnosis of a congenital cardiac diverticulum in two patients. Noninvasive imaging of the diverticulum facilities planning of cardiac catheterization, angiographic imaging and surgical treatment of this rare anomaly.