Mani Neumeier (Manfred Neumeier, born December 31, 1940 in Munich) is a German rock musician, free jazz-drummer, artist, and frontman (singer and drummer) of the German Krautrock-band Guru Guru.

Probably best known for his work with Guru Guru, Neumeier collaborated with numerous bands and artists, such as Dieter Möbius, Damo Suzuki, Harmonia, Hans-Karsten Raecke, Irène Schweizer, Peter Brötzmann, Sonny Sharrock, Uchihashi Kazuhisa, Jojo Hiroshige, Kawabata Makoto, Yoshida Tatsuya, and Luigi Archetti. Neumeier has lived in Germany and Japan. The wax museum of Tokyo has a wax figure of him. He has also regularly collaborated with Japanese jam and noise bands Acid Mothers Temple and Hijokaidan.