The Klaus Doldinger Quartet was a jazz band led by German saxophonist Klaus Doldinger in the 1960s. It originated in Düsseldorf and was founded in 1962. The band released several albums throughout the 1960s in different styles of jazz, including hard bop, Latin jazz, and bebop. They performed live frequently, averaging around 100 gigs a year, and toured several continents such as South America, Asia, and Europe, receiving international acclaim. The band's ensemble occasionally rotated and featured several famous European musicians such as Klaus Weiss, Peter Trunk, and Ingfried Hoffmann, who worked extensively with Doldinger and fostered a long friendship with him.