Chang Myon (hangul:장면; hanja:張勉; August 28, 1899 – June 4, 1966) was a South Korean statesman, educator, diplomat, journalist and social activist as well as a Roman Catholic youth activist. He was the fourth and the last Vice President of the First Republic and the Prime Minister of the Second Republic. His styled name (ho) was Unseok (운석, 雲石). His English name was John Chang Myon (baptismal name, surname, given name).Under the Japanese rule, Chang worked as a teacher.