S(KL_{2, 3}L_{2, 3}) resonant Auger decay processes were studied for mono- and multi-layered CS₂ on Cu(100). It has been found for the mono-layer that a spectator Auger peak shifts almost linearly with incident photon energy (hν) and that it merges into a normal Auger peak when hν is adjusted above the Sls absorption. In addition to the similar hν shift of the Auger peak, it has been observed for the multi-layer that the KL_{2, 3}L_{2, 3} Auger structure is split into a spectator and anormal Auger peaks. The results obtained are explained in connection with the X-ray resonant Raman scattering and the core-hole screening by conduction electrons of the Cu substrate.