Theodor Fischer was a German épée and foil fencer.

Fischer competed in the individual and team épée events at the 1928 Summer Olympics.

[4] He defeating reigning Olympic épée champion Charles Delporte from Belgium, Elie Adda of Egypt, Georgios Ambet of Greece, Josef Jungmann of Czechoslovakia, Frederico Paredes of Portugal, and lost to among others gold-medal-winning Lucien Gaudin of France, Bertie Childs of Great Britain, Édouard Fitting of Switzerland, and Dan Gheorghiu of Romania.

[4] Fischer finished eighth at the 1928 German Fencing Championships.

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