Chai-Anan Samudavanija was a Thai political scientist. He served as director of Vajiravudh College, president of the Royal Institute, judge of the Constitutional Court, and professor of political science at Chulalongkorn University. He was one of the key drafters of the 1997 Constitution of Thailand. During the 2005-2006 political crisis, he was a vocal critic of Prime Minister Thaksin Shinawatra. He was associated with Sondhi Limthongkul: he chaired IEC and was head of several of Sondhi's foundations. Chai-Anan supported the 2006 military coup that overthrew the Thaksin government.