Resumo. In the Indonesian constitutional system, Pancasila has become the philosophical and ideological basis of the state in determining political views and policy directions that affect various aspects of life. In this study, the researcher wants to analyze how Pancasila influences Indonesia's attitudes and policies in implementing international legal norms (jus cogens). In addition, it also examines how Pancasila can be an alternative model in developing international legal norms that are more inclusive and oriented towards common welfare. This research uses a conceptual approach, examining the role of Pancasila in Indonesia's international diplomacy, as well as its contribution to the formation of international legal principles that are fair, balanced, and in accordance with human values. The results show that Pancasila, with its five pillars, provides a strong ethical foundation for Indonesia in facing global challenges, fighting for justice, and promoting international peace. In addition, Pancasila serves as a guideline in Indonesia's efforts to uphold state sovereignty while remaining active in international cooperation.