Following severe land and forest fires that caused transboundary haze pollution in the Southeast
Asia, ASEAN Member States finally made the ASEAN Agreement on Transboundary Haze Pollution
in 2002. By September 2014, Indonesia had ratified the ASEAN Agreement on Transboundary Haze
Pollution. Due to the land and forest fires that happened mostly in Indonesia, Singapore are choking
under a thick haze of smog causing economic, health, and tourism losses to Singapore. When a
country harmed another country, the principles of state responsibility arises. This legal research
examines the implementation of state responsibilities regarding transboundary haze pollution. The
purpose of this legal research is to find out the implementation of state responsibility by Indonesian
government against Singapore losses as the consequence of the ratification of ASEAN Agreement on
Transboundary Haze Pollution. The methods used in this legal research is normative methods, in
which the legal resources are collected through literature studies, interviews, and also focused on
the positive legal norms in the form of international law instruments. Based on the literatures and
interview, Indonesian government has performed the state responsibility by negotiation and
consultation in accordance with Article ASEAN Agreement on Transboundary Haze Pollution.
According to international law, there are two types of state responsibility, including satisfaction and
pecuniary reparation. Indonesia has carried out the responsibility in the form of satisfaction by
sending diplomatic apologies to Singapore and ASEAN. For further regulations in order to arrange
the state responsibility between Indonesia and Singapore, it is better to arranged in bilateral
agreement because the transboundary haze pollution happened frequently.