Franz "Teddy" Kleindin (July 20, 1914, Berlin – October 12, 2007, Berlin) was a prominent German jazz musician known for his skills as a clarinetist and alto saxophonist. He was also a composer, arranger, and bandleader. Kleindin came from a musical family, with his mother being a cellist. Initially trained in cello, he switched to clarinet following a wrist injury at age 13.

Kleindin's career began in 1932 with an engagement in the dance orchestra of Vincent Douglas for the film "Zwei Herzen und ein Schlag." He quickly became a sought-after musician, joining various ensembles, including those led by Teddy Stauffer and Kurt Hohenberger. He was a prolific studio musician, recording with notable bands and artists such as Kutte Widmann, Willy Berking, and Freddie Brocksieper.

During World War II, Kleindin played with several orchestras, including Ernst van’t Hoff's and the propaganda group Charlie and His Orchestra. He also led his own bands, recording in the style of Benny Goodman. His work as an arranger and performer continued post-war, contributing significantly to the German jazz scene. Known for his virtuosity, Kleindin's style was influenced by jazz greats like Benny Goodman, Artie Shaw, and Benny Carter.