This work pertains to the study of inhibiting the corrosion of steel in a corrosive environment containing NaCl at a concentration of 35 g/l using the methanolic extract of the aerial part of Sophora japonica. The evaluation of the anticorrosive activity of steel in the NaCl 35g/l medium was conducted through gravimetric measurements and electrochemical tests. The results obtained showed that the corrosion inhibiting efficiency reaches a maximum value of approximately 91% after the addition of 1300 ppm of the methanolic extract of the aerial part of Sophora japonica.