Klaus Maetzl (1941 – 4 May 2016) was an Austrian violinist, noted as a founder of the Alban Berg Quartet.
He studied at the University of Music and Performing Arts in Vienna with Franz Samohyl, and studied further with Max Rostal.
[1][2] In 1970, Maetzl was a founder member, with Günter Pichler, Hatto Beyerle and Valentin Erben, of the Alban Berg Quartet, in which he played second violin; he remained with the quartet until 1978.
[1] From 1971, he was a professor at the University of Music and Performing Arts.
He served on the juries of several international competitions during his career.