Objective To improve the prenatal echocardiographic diagnostic accuracy for fetus with right aortic arch(RAR).Methods Echocardiographic signs were analyzed and summariedd in 65 cases with prenatal diagnosis of right aortic arch between January 2014 and December 2017. Results Among 65 fetuses with RAR, 35 cases were RAR with aberrant left subclavian artery(1 case was RAR with aberrant left innominate artery),27 cases were mirror-image RAR, 3 cases were double aortic arches. RAR could be alone or with complex intracardiac and extracardiac abnormalities. The morbidity of RAR with aberrant left subclavian artery was higher than other types, and RAR with aberrant left subclavian artery was rarely combined complex intracardiac abnormalities.The position of the ductus arteriosus was different between different types of RAR.Part of the RAR could form vascular ring. Conclusion Different types of RAR have different structural characteristics, and have the characteristic fetal echocardiographic features, it has certain difficulty to prenatal diagnosis part of mirror-image RAR and RAR with aberrant artery.