In the present study, 2-D numerical analysis of strip-type specimens of laminated composites with and without damage are considered and numerical investigation is carried out by using the finite element program ANSYS. The surface and oblique resistances are numerically calculated according to the two-probe and four-probe methods. Electrical conductivity of the composite laminate in the longitudinal direction is given constant, while electrical conductivity in the through-thickness direction is used as a variable in the parametric study. The resistance change for each case due to delamination is estimated by comparing the obtained resistance with the corresponding value of the specimen without delamination. Applicability and effectiveness of the proposed method are investigated by using various locations and lengths of a delaminated crack in the specimen.