Anomalous origin of the right coronary artery (RCA) is uncommon in patients undergoing cardiac catheterization. Most RCA anomalies are usually found incidentally. However, some anomalies may be associated with malignant courses such as myocardial ischemia, syncope or sudden cardiac death. We present a previously unreported case of a 55-year-old female who had anomalous RCA arising from the diagonal branch of LAD, a variant of L-II Lipton classification, which caused chest pain.