Examination of dislocation behavior in the level of atomic scale is one of effective approaches for understanding inelastic deformation behavior of engineering materials. In this study, a molecular dynamics code incorporated with a modified EAM (MEAM) potential proposed by Baskes was developed to investigate the dislocation behavior in nickel alloys. As verification of the code, molecular dynamics simulations for a nickel metal containing with an edge dislocation and an impurity element were carried out. Consequently, it was shown that the dislocation behavior had some temperature dependences in terms of dislocation velocity and Peiers stress. Then, it was demonstrated that the edge dislocation was made transferred under the influence of some kinds of element that seemed to be effective for solid-solution strengthening of nickel alloys. Therefore, it was proved that the MEAM potential was effective for at least qualitative evaluation of dislocation behavior.