Hein van de Geyn (born July 18, 1956, in Schijndel, Netherlands) is a distinguished jazz double bassist, composer, bandleader, and educator. After studying classical violin for 15 years, he transitioned to electric bass as a teenager before ultimately finding his voice on the double bass.

Van de Geyn worked in the United States during the early 1980s, living in Seattle and San Francisco, before returning to Europe in 1983, where he established himself as one of the continent’s most sought-after bassists. Throughout his three-decade career, he performed with jazz legends including Chet Baker, Toots Thielemans, and Lee Konitz.

His groundbreaking Comprehensive Bass Method has influenced a generation of bassists and is widely regarded as one of the leading pedagogical works for jazz double bass. In 1996, he became head of the bass section in the jazz department at the Royal Conservatory in The Hague, and in 2004, he became the sole owner of Challenge Jazz Records.

In 2009, Hein van de Geyn relocated to the Cape of Good Hope in South Africa, where he continues his work as a performer, educator, and author.