The Argon Dark Matter (ArDM) project aims at operating a large noble liquid detector to search for direct evidence of Weakly Interacting Massive Particles (WIMP) as Dark Matter in the universe. It consists on a one-ton liquid argon detector able to read independently ionization charge and scintillation light. I will describe the experimental concept and the physics performance of the ArDM experiment, which is presently under construction and commissioning on surface at CERN.