This research is proposed to answer three problem. First, the rules of International law in theprotection of the marine environment from oil pollution originating from vessel. Second, efforts weremade by the three littoral countries cooperation in preventing, reducing and controlling oil pollutionoriginating from vessel in the Straits of Malacca and Singapore. Third, the role of the governmentof Indonesia in prevention, reduce and control oil pollution originating from vessel in the Straits ofMalacca and Singapore. This research is normative research using qualitative research methods. Theresearch approach using statute approach and case approach. The results of this research shows thatinternational law has been comprehensively regulate the protection of the marine environment frompollution by oil originating ships: the United Nations Convention on the Law of the Sea (UNCLOS)1982, The International Convention for the Prevention of Pollution from Ship (MARPOL) 73/78,International Convention on Oil Pollution Preparedness 1980, the Civil Liability Convention for OilDamage (CLC) 1992 and the Convention on the Establishment of an International Fund forCompensation for Oil Pollution Damage (FUND) 1992. Second, Indonesia, Malaysia andSingapore as states bordering the straits cooperate with other stakeholders (user states, userindustries, IMO, NGOs) have established a cooperation mechanism in the form of cooperativeforums, project coordination committee and the Aids to Navigation Fund. Third, Indonesia through itslaws and regulations have ensured the prevention, reduction and control of oil pollution originatingfrom vessel through Act No. 17 of 2008 on Shipping, Government Regulation No. 21 of 2010 onthe Protection of Maritime Environment, and Presidential Decree No. 109 in 2006 on DisasterEmergency Due to Oil Spill in the ocean.