In this study, defect shape evaluation based on the magnetic flux leakage (MFL) technique for inclined defects was conducted. A magnetic dipole method was used to represent the defect surface, and the Tikhonov regularization technique was used to reconstruct the magnitude of magnetic dipole moments. The result of the inverse analysis using magnetic flux obtained from numerical calculation showed good agreement with shape of the original defect. In case of inverse analysis using magnetic flux obtained from experimental measurement, the L-curve did not indicate clear kink point. However, applying the optimal regularization parameter defect shapes could be reconstructed with acceptable errors.