Roger Grenier (19 September 1919 – 8 November 2017) was a French writer, journalist and radio animator. He was Regent of the Collège de ’Pataphysique.

As a youth, Grenier lived in Pau, where Andrélie opened a shop selling glasses. During the Second World War, he attended classes taught by Gaston Bachelard at the Sorbonne while participating in the French Resistance before actively participating in the 1944 liberation of Paris. In his memoir Paris ma grand'ville, Grenier describes being briefly arrested and narrowly avoiding execution by the Occupation forces on the boulevard Saint-Germain.