Heinz Oskar Vetter (21 October 1917 – 18 October 1990) was a German trade union leader and politician. Born in Bochum, Vetter completed an apprenticeship as a locksmith, before becoming a machinist at a coal mine. He served in the Luftwaffe during World War II, before returning to mining. He joined the Union of Mining and Energy (IG BE), and became a union representative, working full-time for the union from 1952. In 1953, he joined the Social Democratic Party of Germany.