Charles Edward Haden (August 6, 1937 – July 11, 2014 Shenandoah, IA) was an American jazz double bass player, bandleader, composer and educator whose career spanned more than fifty years. Haden helped to revolutionize the harmonic concept of bass playing in jazz, evolving a style that sometimes complemented the soloist, and other times moved independently, liberating bassists from a strictly accompanying role.