T This thesis discusses the case of Enforced Disappearance of 13 Activists that occurred in 1997-1998 in Indonesia within the framework of the International Convention for the Protection of All Persons from Enforced Disappearance (ICPPED) 2006 and State responsibility under International Law. Enforced Disappearance is a gross violation of human rights that has not been resolved judicially or non-judicially. This research formulates two main problems, namely what actions should be taken by the government in resolving the case of enforced disappearance of 13 activists in 1997-1998 in relation to ICPPED 2006 and why the case of enforced disappearance of 13 activists is contrary to state responsibility in international law. The research method used is normative research using descriptive type of normative research, using secondary data obtained from library materials supported by primary data. Data analysis is carried out qualitatively by drawing conclusions using the deductive method. Although Indonesia has signed the ICPPED, the ratification process is still hampered by political factors. process is still hampered by political factors. In addition, the lack of effective law enforcement In addition, the lack of effective law enforcement creates a continuous chain of impunity. The government should ratify the ICPPED as soon as possible, establish an ad hoc human rights courts, disclose the whereabouts of victims and provide compensation and rehabilitation to the families of victims. compensation and rehabilitation to the families of victims, to fulfil its responsibility in accordance with the ARPPED principles. fulfil its responsibilities in accordance with the principles of ARSIWA 2001.