Pierre Guillaume (22 December 1940 – 11 July 2023)[1][2] was a French political activist and publisher. He was the founder of the Paris book shop La Vieille Taupe in 1965 and later the Holocaust denying publishing house of the same name.[3] A former member of Socialisme ou Barbarie, he moved to Pouvoir Ouvrier with Jean-François Lyotard and Pierre Souyri.