Abstarct: Steel plate shear walls (SPSWs) as lateral force resisting system in buildings has been used since 1970s. SPSWs resist lateral loads through development of diagonal tension field which occurs after buckling of steel infill panel. High ductility, stiffness and strength of the system against lateral forces are the most essential advantages of SPSWs. Openings in steel plate shear walls are located for utility passage or architectural reasons. In this research, the effect of shape of openings, location and stiffeners around the openings on the strength and stiffness of the SPSWs are investigated. Openings are located in the corner of panel around the boundary elements(beam and column) to accommodate utility passage. ABAQUS 6.9 software was used for modeling. The models were compared with reliable experimental data of Bruneau and Vian(2004). It was observed that there is a good agreement between the experimental and the analytical results. Nonlinear static analysis will be used for models. These analyses are inspecting the behavior of the SPSWs(e.g. stiffness and strength).