The Extraordinary Chambers in the Courts of Cambodia, commonly known as the Cambodia Tribunal or Khmer Rouge Tribunal (សាលាក្ដីខ្មែរក្រហម), was a court established to try the senior leaders and the most responsible members of the Khmer Rouge for alleged violations of international law and serious crimes perpetrated during the Cambodian genocide. Although it was a national court, it was established as part of an agreement between the Royal Government of Cambodia and the United Nations, and its members included both local and foreign judges. It was considered a hybrid court, as the ECCC was created by the government in conjunction with the UN, but remained independent of them, with trials being held in Cambodia using Cambodian and international staff. The Cambodian court invited international participation in order to apply international standards.

The Khmer Rouge is the name that was popularly given to members of the Communist Party of Kampuchea (CPK) and by extension to the regime through which the CPK ruled Cambodia between 1975 and 1979. The name was coined in the 1960s by then Chief of State Norodom Sihanouk to describe his country's heterogeneous, communist-led dissidents, with whom he allied after his 1970 overthrow.