Summary: This paper is concerned with the problem of point force and point charge applied in the interior of an infinite two-phase transversely isotropic piezoelectric solid. Based on the general solutions, by using the method of the image source, a series of displacement functions are constructed. The Green’s functions are obtained when arbitrary constants are determined by the boundary conditions on the interface. Furthermore, we reduce the present solutions to the extension of Mindlin results and of Lorentz results for semi-infinite transversely isotropic piezoelectric materials by suitable substitutions of boundary conditions on the interface.