Carrying out the obligations arising from the international agreements concluded in good faith is a moral and ethical international law that the subjects of international law must carry out. International agreements create obligations and give birth to certain rights for the parties to the agreement. This research examines legal norms in the text of the 1945 Constitution, statutory regulations and court decisions and other legal policies as a form of implementation of international obligations arising from international treaties, international customary law and decisions of organizations and international courts in Indonesia. The findings show that, in practice, the implementation of international obligations in Indonesia can be seen when exercising the judiciary's role in Indonesia, which will only interpret a rule established by parliament as a legal basis.