Arbitration agreement is an agreement by the parties to submit to arbitration all or certain disputes which have arisen or which may arise between them in respect of defined legal relationship, whether contractual or not. Arbitration has become increasingly popular in settling international and domestic commercial disputes nowadays. The importance of arbitration agreement cannot be overemphasized. It is the most reasonable way to settle commercial disputes. There are two types in arbitration agreement. one is arbitration clause, the other is submission agreement. The arbitration agreement must be made in writing, in addition, other communication instruments shall be considered as effective arbitration agreement if they are properly documented. Over the past few decades, a considerable number of studies have been conducted on the legal property of arbitration agreement in Germany and Japan. Its legal property is aspect of substantial law contract. The basis of arbitration agreement is the principle of party autonomy. The important effect of arbitration agreement is to preclude jurisdiction from national court. The respondent shall raise a plea not later than when submitting his first defense on the merits of the action. As positive effect of arbitration agreement, the court must support the conduct of arbitral proceedings and arbitrator can be appointed upon request of a party.