Jeffrey Allen Ament (born March 10, 1963) is an American musician best known as the bassist of rock band Pearl Jam, which he co-founded alongside Stone Gossard, Mike McCready, and Eddie Vedder. Ament wrote or co-wrote many of Pearl Jam's hits, including "Jeremy", "Oceans", "Dissident", "Nothingman" and "Nothing as It Seems".
Prior to his work with Pearl Jam, Ament was part of the 1980s Seattle-based grunge rock bands Green River, Mother Love Bone, Temple of the Dog and Three Fish.