Gun Lanciai (born Gunvor Westerberg on 10 November 1920 in Borgå, Finland; died 15 March 2013 in Helsingør, Denmark), was a Swedish-Finnish sculptress.
She was also the illustrator of the Swedish-language school book Vi på Solgård, for reading for the lower levels in Finland by the suggestion of her lifelong friend the writer Solveig von Schoultz.
Gun Lanciai lived most of her life in Sweden (1955–2004), was a Finnish citizen until 1965 and from then on a Swedish citizen.