Atomic structures of Ag2Te in the low‐ and high‐temperature phases have been studied using a scanning tunneling microscope in air and an x‐ray diffraction system. In the low‐temperature phase having a monoclinic lattice, (001) and (01̄0) atomic images are obtained. In the superionic high‐temperature phase, which is stable at temperatures above 145 °C, (100) surfaces of the Te cubic lattice are observed. In both phases, surface atomic reconstructions are not detected.