In this study, the shear resisting behaviors of the reinforced concrete beams strengthened with E.M.S(Epoxy Mortar including fiber Sheet) panel are investigated by test. The main variables in this test are the kind of strengthening material, panel thickness, the spacing of CFS(Carbon Fiber Sheet) stirrups and the amount of CFS. The results of this study are as follows : 1) The variables that had effects on the increment of the shear capacity were panel thickness, the shear span/depth ratio and shear reinforced ratio by CFS. 2) A formula to calculate the shear strength of beams strengthened with E.M.S panel was proposed considering the main variables. 3) The proposed equation showed a better agreement with the ultimate shear strength of RC beams with E.M.S panel very well.