From the reunification of Germany we can learn much for the reunification of Korea. That particularly applies for the dispute resolution of the trade relations between both states. The domestic trade relation, which was the only contractually regulated relation between two states for a long period of time, played a crucial role in the reunification of Germany, In this research paper, we examine how the economic disputes in divided Germany had been settled, and consider for the amicable economic relations between south and north Korea, what can we learn from that. In Germany, the disputes from the trade relations could be settled via the civil procedure, because the judicial codes of both German states were the same until 1975, However, that does not apply in Korea, as two Koreas have another law and another court system, from the start. We argue that arbitration is the best way for the completion of the economic disputes. Besides the general advantages of the arbitral procedure, the arbitration is particularly suitable to regulate the economic disputes from Korea-Korea relations, because of glaring differences of the legal status and reality of both countries. Furthermore, the standing arbitral tribunals would be in the economic relations between two Koreas more effectively than the ad-hoc arbitral tribunals. The ad-hoc arbitration generally requires a lot of time to setting up an arbitral Oibunal. For the rapid and obligatory settlement of dispute, the Convention of Currency, Economic and Social Union between West and East Germany 1990(Staatsvefrag zur Wahrungs-, Wirtschafts- und Sozialunion zwischen der Bundesrepublik und der DDR) also planned the institutional arbitration. The organizational support of the internal-Korean arbitration can take place via already existing institution, namely in south Korea 'The Korean Commercial Arbitration Board' Periodic decision reports and publication of substantial awards at the early stage seem appropriate.