Gunar Kirchbach (born 12 October 1971) is a German sprint canoer who competed in the mid-to-late 1990s. He won a gold medal in the C-2 1000 m event at the 1996 Summer Olympics, together with teammate Andreas Dittmer.
Kirchbach also won five medals at the ICF Canoe Sprint World Championships with two golds (C-2 1000 m: 1994, 1997) and three bronzes (C-2 500 m: 1993, 1995; C-2 1000 m: 1995).