The intensity of X-rays scattering by solitons has been calculated. Bo
th kink-type solitons due to adatoms on the crystals surface and solit
ons in the coupled electron-phonon system of the one-dimensional molec
ular chain are considered. The space and time formfactors are evaluate
d. The X-ray scattering study is shown to make it possible to examine
the main soliton properties as the neutron scattering ones.