Claus Bantzer (born October 10, 1942 in Marburg) is a German church musician, composer and director.Claus Bantzer was born in Marburg in 1942 into an artist's family. His older brother Christoph Bantzer is an actor.Bantzer began studying piano, organ, and conducting at the music school of the university of Frankfurt am Main. He continued his studies in Hamburg (Hochschule für Musik und Theater), where he became a master student of the organ teacher Heinz Wunderlich. He was also Wunderlich's assistant at the church St. Jacobi in Hamburg.Since 1975, Bantzer has been organist at the church of St. Johannis Harvestehude in Hamburg. Later, the honorary title of Kirchenmusikdirektor was conferred onto him. At this church, he leads two choirs, the main church choir of St. Johannis and the chamber choir Harvestehuder Kammerchor, which he founded.As a composer of music for more than 20 films, he has worked closely the film directors Peter Lilienthal, Doris Dörrie, Jan Schütte and Tevfik Başer. Apart from his compositions for film, he has also composed other works, usually combining religious lyrics with modern music, in particular jazz.