The finite layer method is the most efficient numerical method for 3D analysis of simply supported rectangular plates. In this method, the plate is divided into a number of finite layers. Within each finite layer, trigonometric functions are used for the in-plane interpolations of displacements, whereas polynomials are employed for the interpolations in the thickness direction. Thus, the 3D analysis is transformed into a series of 1D analyses, and the efficiency is enhanced significantly. In the present study, the finite layer method is extended to the stability analysis of piezoelectric antisymmetric angle-ply laminates, which may be also combined with some symmetrical cross-plies. Numerical results are presented to verify the proposed method. The effects of side-to-thickness ratio, aspect ratio, number of plies, fiber-orientation, and electrical conditions on stability behaviors of some piezoelectric laminates are investigated.