The article presents formulas for damping matrix correction of finite-element model by using damping coefficients determined experimentally. The purpose of the work is to clarify the finite element model of the object by test results. In the adjusted matrix some coefficients are derived from experimental data, the others are considered to be proportional to the corresponding coefficients of the stiffness matrix. The proposed method was confirmed by conducting modal tests of steel beam with subsequent damping matrix correction offinite element model.