Buschi Niebergall (July 18, 1938 – January 9, 1990) was a German free jazz musician. His given name was Hans-Helmut, and late in life, his friends called him Johannes. Born in the city of Marburg into a family of academics (his father was a professor of theology and temporarily rector of the University of Marburg), Niebergall enrolled in medical school. Playing acoustic guitar, he got in contact with other musicians and quit his studies. As double-bass player Niebergall became co-founder of several of the first and most influential Free Jazz formations of Germany during the mid-1960s. Gunter Hampels quintet "Heartplants" and "Voices" by the Manfred Schoof quintet are two excellent examples of this independent European free jazz development.