Antti Juhana Kuosmanen (born 1950, in Juva) is a Finnish diplomat. He headed the Finnish Embaassy in Singapore for half a year in 2015. In 2013-2015 he was Finland's Senior Official for ASEM (Asia-Europe Meeting). In 2009-2013 he was Finland's Permanent Representative to the OECD and Unesco. Until then he was Finland's ambassador to the People's Republic of China and Mongolia (2005–2009). He joined the Finnish Diplomatic Service in 1976 and has served in various functions, including as member of the team that negotiated Finland's accession to the European Union. He served as Director at the General Secretariat of the Council of the EU in 1996–2002 and has written a book on Finland's accession negotiations to the EU entitled Finland's Journey to the European Union (EIPA 2001). He is married and has two adult daughters.