The terms Seat of Arbitrationé and Place of Arbitrationé are interchangeably used in the international arbitration context. They share the same meaning. The seat or place of arbitration is not synonymous with the venue of arbitrationé. Its true meaning is the legal situs of the arbitration from which the award is made or considered rendered. The court of the seat has exclusive jurisdiction to set aside or annul the award. The arbitration law (lex arbitri) of the seat is the primary source of the arbitral tribunalûs power to grant interim relief, including an anti-suit injunction. Such lex arbitri also plays a pivotal role in the constitution of the tribunal and has a direct bearing on such other issues as the arbitrability of the disputes and the ability of the tribunal to award interest and/or costs. Section 26 of the Thai Arbitration Act B.E. 2545 (2002 A.D.) is a mirror image of Article 20 of the UNCITRAL Model Law (1985). Unfortunately, the Thai terminology for place of arbitrationé as is used in Section 26 of the Thai Arbitration Act is synonymous with the venue of arbitrationé. The term is generic and somewhat misleading. For the exclusive purpose of this article, the writer has adopted a new Thai word for the seat of arbitration: a word which implies legal domicile of arbitration more than the edifice or physical location of arbitrational activities. The new word is used as a tool to elicit the true meaning of the seat of arbitration and its legal significance.