Marc Geujon (born 8 October 1974) is a French classical trumpeter.

Born in Gonnehem (Pas-de-Calais), Marc Geujon studied trumpet at the music school of Gonnehem with Gilbert Breuvart, at the École Nationale de Musique of Arras in Philippe Vaucoret's class, then at the conservatory of Rueil-Malmaison with Éric Aubier.

He is also a chamber musician with the Paris Opera Brass Quintet, David Defiez,[2] Nicolas Vallade[3] and Fabien Wallerand.

[4] He regularly performs as a soloist in Europe, Asia and the United States.

He also collaborates with the Schilke instrument maker[5][6] (Chicago-USA), in particular for the Soloiste Serie (Models SC4-MG and SB4-MG).