Klaus Zwickel (born 31 May 1939) is a German former trade union leader.
Born in Heilbronn, Zwickel completed an apprenticeship as a tool maker, and joined IG Metall in 1954.
[1] IG Metall was affiliated to the German Confederation of Trade Unions (DGB), and in 1965, Zwickel became organising secretary of its Neckarsulm branch.
As leader of the union, he was known as a strong negotiator and expert on tariffs.
He resigned from all his union posts in 2003, amid conflict between traditionalists and modernisers in IG Metall.