Gabriel Janoušek (born 29 November 1940 in Turnov) is a Czechoslovak retired slalom canoeist who competed in the 1960s and 1970s.
Janoušek won three medals at the ICF Canoe Slalom World Championships with two silvers (C2: 1967, C2 team: 1967)[1] and a bronze (C2 team: 1971). He also finished 11th in the C2 event at the 1972 Summer Olympics in Munich.