  A new mechanism for single spin asymmetries in strong interaction is
proposed. It is based on instanton-induced nonperturbative chromomagnetic
quark-gluon interaction. We estimate the contribution of this interaction to
single spin asymmetry in quark-quark scattering. It is shown, that interference
between quark spin-flip amplitude induced by instantons and spin-nonflip
amplitude, which is related to nonperturbative two gluon exchange, gives a
large value for a single spin asymmetry. Due to strong increasing of the
instanton-induced spin-flip amplitude with energy, this asymmetry does not
vanish at high energies.
