The tensile creep properties of polycrystalline BeO, above 1550 deg C and under stresses from 50 to 200 psi, are: (a) the activation energy for creep is about 5 ev, (b) the creep rate increases linearly with the applied stress, and (c) an anomalous creep phenomenon, dependent upon the strain and temperature, and possibly associated with polygonization'' and recrystallization'' of the material during creep, is present. Creep behavior of polycrystalline BeO may be interpreted in terms of the Nabarro-Herring concept of vacancy diffusion. The dislocation-climb concept, by Mott and Weertman, may apply at stresses sufficiently high to cause yielding. (auth)