Wilhelm "Willi" Fischer (born 26 August 1972, in Frankfurt am Main) is a German former professional boxer.
Fischer made his professional debut in July 1995, a draw.
Fischer would bounce back however, winning his next 10 fights to amass a 21–1–1 record.
Fischer won his next four before facing Kim Weber in a rematch for the German International (BDB) Heavyweight title, winning via majority decision.
After also dropping his next fight to 9-0 Rene Monse for the vacant International BDB title, Fischer would go 11–2 in his last 13 fights, the pair of losses being in bouts for the Germany BDB Heavyweight titles in 2003 and 2004.