The　macroscopic　hyperelastic　behavior　of　fiber　reinforced　polymer　composites　is　studied　using　the　micromechanical　model　and　finite　deformation　theory.　It　is　assumed　that　the　fiber　and　matrix　are　hyperelastic　media　and　undergoing　finite　deformation.　The　local　fields　of　a　representative　volume　element　are　calculated　by　the　hyperelastic　finite　element　method.　Then　an　averaging　procedure　is　used　to　find　the　homogenized　stress　and　strain　and　the　macroscopic　curves　of　stress-strain　are　obtained.　The　several　microstructural　parametric　effects　on　the　macroscopic　hyperelastic　behavior　are　considered.　The　numerical　examples　show　the　hyperelastic　behavior　and　deformation　of　the　composites.