Bernd Fischer (18 December 1936 – 13 August 2020) was a German mathematician.

He did his PhD in 1963 at the Johann Wolfgang Goethe University of Frankfurt am Main under the direction of Reinhold Baer.

[1][2] Fischer went to Goethe University in Frankfurt to study mathematics under Baer in the early 60s, receiving his PhD in 1963.

Robert Griess independently discovered the Monster group and published a description in 1976.

[5] Fischer went on to compute the character table for both monsters, in collaboration with Donald Livingstone and Michael Thorne.