Supachai Panitchpakdi (Thai: ศุภชัย พานิชภักดิ์, rtgs: Supphachai Phanitchaphak; born May 30, 1946 in Bangkok, Thailand) was Secretary-General of the UN Conference on Trade and Development (UNCTAD) from 1 September 2005 to 31 August 2013. Prior to this, he was the Director-General of the World Trade Organization from September 1, 2002 to September 1, 2005. He was succeeded by Pascal Lamy.
In 1986 Supachai Panitchpakdi was appointed as Thailand's Deputy Minister of Finance, but when the parliament was dissolved in 1988 he left politics and became president of the Thai Military Bank. In 1992 he returned to politics and became Deputy Prime Minister until 1995, responsible for trade and economics. During the Asian financial crisis in November 1997 he returned to be Deputy Prime Minister and also became Minister of Commerce.
In September 1999 he was elected to become Director-General of the World Trade Organization (WTO), sharing the post with competitor Mike Moore when a decision could not be reached. Taking the second half of the six-year term, he entered office on September 1, 2002.