Koreans were surviving on an average of 67 dollars a year in the year of 1953. Six decades later, Korea is one of the top five car producers and the eighth-largest trading nation. Thus, Korea was grown up out of export and international trade. We have few natural resources. But the man power and enthusiasm of education of the parents are remarkable in the world. Through these factors we could achieve one trillion dollars trade volume. Internationally fast every countries have export or trade supporting system. We are also making effort to support trade through trade insurance. It is operated by the Korea Trade Insurance Corporation. In former times only the export was supporting object. But now, not only export, but also import is also supporting object. The import is also very important for the improvement of the export. The European Union has its own trade supporting system. But unlawful subsidy is prohibited by international treaty. Therefore the EU has established the concept of marketable risk. The marketable risk is taken over by the civil insurance companies. And the government subsidy is prohibited in that field. Especially the German export credit system is divided by two sectors. One is civil sector, another is governmental sector. The credit insurance company Euler Hermes is operating the export credit insurance according to the trust of the German government. In Germany, the dual system of administrative law and civil contract law is studied by scholars in the field of export credit insurance. The two sectors of administrative law and civil contract law are closely connected. And the constitutional root or background is also important research object. For the improvement of our trade supporting system we should consider foreign examples. The European and German system can give us important suggestions. Through these comparative study we can learn the importance of theoretical study on export credit insurance. And the support of small and midium sized companies through export credit insurance is also very important. For this goal and the effective trade support, the Korea Trade Insurance Corporation should do its best efforts. Then we can achieve our ultimate goal of powerful economic nation in the world without violating international treaty, namely WTO agreements.