Ole Amund Gjersvik (born 10 December 1963) is a Norwegian Jazz musician (upright bass) and composer, central on the Bergen jazz scene and known from a number of record releases.

[1] Gjersvik was born in Bergen, Norway, where he studied at the Grieg Academy and Bergen Conservatory of Music, where he has also taught.

Gjersvik is very versatile and has played with musicians like Kaizers Orchestra, Ketil Bjørnstad, Ole Thomsen, Kåre Thomsen, Ole Paus, Jan Eggum, Herborg Kråkevik and Sissel Kyrkjebø.

He has also been widely used in theater and television connection, and has participated on many albums.

Under his own name, he has published A Voice from the Past (1990) and Milonga Triste (1998) among others, and Combo Tango Plays Music by Ole Amund Gjersvik (2002).