  We study the properties of the Ramond fields in superstring theory in the
presence of a constant B-field and the subsequent implications of space-time
noncommutativity for space-time fermions and space-time supersymmetry. We find
that the noncommutativity of space-time coordinates leads to extra
singularities in the spin field correlators and to appearance of the extra
poles in the RR scattering amplitudes, carrying the opposite GSO parities.
