Game theory in international law is one of the innovative perspectives in the field of philosophy of international law. The disinctive nature of this perspective is that instead of merely theorizing, it has a goal to explain international rules and structure in a logical and practical manner. In 1944, in the field of economy, this theory was proposed for the first time by von Neumann, a mathematician, in partnership with Morgenstern, an economist. But since then, it has gradually entered into other academic fields such as international relations, sociology, etc. In recent years, for the first time in international law, two great researchers namely Jack L. Goldsmith and Eric A. Posner, applying this theory, have explained the manner of formation and due respect of international customs. In international law, this issue has been considered as a new approach and has successfully drawn attention to its own. In this article, it has been tried to analyze the legal framework of the World Trade Organization (WTO) from the perspective of this theory. It is believedthat our findings in terms of game theory help researchers to understand the framework of that organization more easily. The research methodology used in this article is analytical. For this purpose, the required rules from game theory are introduced and briefly explained and then from the perspective of what was said, we will survey a number of items and agreements from the total collection of WTO and will prove a logical stand that will be applicable to the whole legal framework of WTO.