An analytical solution is presented to determine the interlaminar stresses of general cross-ply laminated beams with piezoelectric layers. The displacement field is assumed within the framework of a third-order shear deformation beam theory. The strain components are obtaind using von-Kàrmàn nonlinear straindisplacement relations. Also, it is assumed that the electric potential varies linearly through the thickness of each layer. Using the principle of minimum total potential energy, equilibrium equations are obtained in terms of stress resultants. Finally, a set of ordinary differential equations with constant coefficients are obtained. The solutions of the equations are the unknown assumed functions for displacement field. Numerical results clearly indicate the singular behavior of interlaminar normal and shear stresses near the ends of the laminated beam.

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