A thermal shock problem of rotating generalized thermoelastic half-space with diffusion is considered. The governing equations of the model are reduced in xy-plane in terms of non-dimensional quantities. The corresponding finite element equations are obtained, the solutions of which are subjected to required initial and boundary conditions. Using finite element method, the distributions of displacement components, stress components, temperature, chemical potential and mass concentration are computed for copper material as a particular material of the model. These distributions are shown graphically against the distance from boundary to observe the effect of rotation parameter.