Construction and analysis of the pion scalar-isoscalar form factor in the elastic region is presented. Precise S-wave ππ scattering phase shifts generated by dispersive analysis of experimental data with imposed crossing symmetry condition are used. Final result for values of the f 0 (500) meson mass and width, m σ = (487 ± 31) MeV; Γ σ = (542 ± 60) MeV is compatible with the results from dispersive analyses of the Bern and Madrid-Krakow groups to be considered now as the most reliable values of the f 0 (500) scalar meson parameters. Parameters of the f 0 (980), although lying almost on the KK threshold also agree with values predicted by these two groups.