Аннотация:The contribution from scalar meson (S) exchange to the potential of the muon-proton interaction in muonic hydrogen induced by the scalar meson coupling to the two photon state is calculated. An estimate of transition form factor S is given on the basis of the quark model and experimental data on the decay widths. It is shown that scalar meson exchange contribution
to the Lamb shift in muonic hydrogen ELs(2P -2S ) is large and important for
a comparison with precise experimental data.