  The possibility for the occurrence in crystals of a phenomenon, resembling
turbulence, is discussed. This phenomenon, called {\it heterophase turbulence},
is manifested by the fluctuational appearance inside a crystalline sample of
disordered regions randomly distributed in space. The averaged picture for such
a turbulent solid is exemplified by an exactly solvable lattice-gas model. The
origin of heterophase turbulence is connected with stochastic instability of
quasi-isolated systems.
