Rigid Plastic Finite Element Method (RPFEM) for reinforced soil structure was developed and reinforcing soil effects were analytically examined The developed method can consider not only effects of soil properties such as shear strength depending on confining stress or dilatancy but also effects of reinforcing material strength ma series of the numerical examination, the effects of tensile strength of reinforcing material were especially investigated and results by the developed method were compared with the result by RPFEM incorporating constrain condition of no change length by reinforcements. In this paper, outline of numerical method is explained and the numerical examination results are shown.