A method was proposed for simulation of the solid state sintering behavior of two spherical particles with different chemical composition, namely, Ag and Cu particles, and the formation of interparticle neck composed of an eutectic composition. For sintering of Ag and Cu particles, a eutectic point exists in the two-composition system, and the sintering behavior depends, on the sintering conditions. For a sintering temperature near the eutectic point. the sintering progresses with the formation of a neck between two particles, and for lower temperature, the sintering progresses without the neck. For the sintering without formation of the neck. the simulation method employed the rate of mass transport derived by, evaluating the surface and grain boundary energies of the system (model 1) For the sintering with formation of the neck, a hybrid simulation method was employed in which model I was switched to a model for solid solution type according to the volume of grain growth model 11,. The validity of the proposed simulation method was confirmed by, the agreement of the simulated Values with the experimental ones, Consequently, by analyzing the effect of sintering condition in,shrinkage and grain growth, it was possible to determine the best sintering conditions. It was also possible to evaluate the ratio of composition in the solid solubility neck.