Structural features of polyurethane-urea (PUU)/organoclay nanocomposites have been investigated by FTIR and small angle x-ray scattering techniques. It is found that the clay has significant influence on morphology of the hard segments (HS) of the PUU. The HS domains which have rough surface, becomes more compact with mass fractal morphology with increase of clay content. FTIR suggests the clay interacts with PUU through hydrogen bonding network in HS domains leading to improvement of the mechanical properties.