The marine environment and its pollution are among the issues that the International Maritime Organization has paid special attention to since its establishment and has responded to it in various ways. One of the fundamental issues in this area is civil liability arising from marine pollution. As a competent institution, this organization has defined its actions based on the Convention on the Law of the Sea. Article 235 of this Convention addresses the issue and provides provisions related to the "duties and responsibilities" of states. The research method in this study is descriptive-analytical and the findings show that maritime activists have been seeking to develop comprehensive laws for dealing with liability and compensation in the event of maritime accidents and incidents, laws that are global in nature and that all countries are required to comply with. It seems that the International Maritime Organization has provided an effective and extensive performance in this field and is trying to create a comprehensive legal framework regarding liability and compensation. This organization has played a significant role in ratifying international conventions and sometimes amending them to resolve problems. It also tries to encourage countries to accede to these conventions so that victims of maritime accidents can receive appropriate compensation.