Laurent Greilsamer (2 February 1953 – 8 November 2023) was a French journalist and essayist.

He joined Le Monde in 1977 and served in the positions of editor, reporter, senior editor, editor-in-chief, deputy editorial director, and deputy director, where he served from 2007 to 2011.

On television, Greilsamer presented the program Le Monde des idées from 2005 to 2006.

[3] He also wrote La parole est au garde des Sceaux, broadcast on France 5 in 2016.

Additionally, he authored four biographies: Le Prince foudroyé : la vie de Nicolas de Staël, L'Éclair au front : la vie de René Char, L'Homme du Monde : la vie d'Hubert Beuve-Méry, and La Vraie Vie du capitaine Dreyfus.