Ab Baars (born November 21, 1955, in Axel, Netherlands) is a Dutch saxophonist and clarinetist who has had an active performance career since the 1970s.
At the age of 18 he entered the Rotterdam Conservatory where he pursued saxophone studies in both classical and contemporary styles of music like jazz and rock.
Baars' 1997 album A Free Step was dedicated to recording previously unheard compositions by Carter who had died in 1991.
His participation in that group introduced him to several of his long time musical collaborators in concerts and on disc, including tubist Larry Fishkind [de], violinist Ig Henneman, keyboardist Guus Janssen, composer/pianist Misha Mengelberg, cornetist Butch Morris, and trombonist Wolter Wierbos.
Beginning in 1996 the trio occasionally added a fourth guest member in concerts and recordings, trombonist Roswell Rudd.