Abstract: This paper presents a new boundary integral formulation involving three generalized forces and three generalized displacements for the Reissner's plate bending problems. It is derived from the virtual work principle and based on the two displacement functions proposed by IIu Hai—chang. It may be applied to both thick and thin plates with arbitrary boundary conditions and arbitrary loads. Three test problems with the uniformly distributed load are worked out and results are compared with the analytical solutions.