Effect of the recording and readout light polarizations on the hologram efficiency in an amorphous As-S-Se film ( a-As-S-Se film) is experimentally studied. Elementary holograms-holographic gratings recorded by two light beams of equal intensity but with generally different polarizations (linear s-s, p-p, s-p, circular L-L, L-R) are considered. The highest efficiency is found in the case of orthogonal circular L-R polarizations. Special attention is paid to the hologram readout which is previously scarcely investigated. Not only the readout beam polarization but also its orientation was varied. It is found that diffraction efficiency does not strongly depend on the readout beam orientation. Readout beam polarization is more significant, and in the optimal case it coincides with the recording beam polarizations for s-s , p-p and L-L gratings. This situation differs from that in the case of previously studied W-75 azobenzene molecular glassy films when strong orientation dependence was found[1]. The obtained results are analyzed using thin polarization grating theory [2] and taking into account the recording mechanisms leading to accompanying surface relief gratings as well. These studies can be used for the holographic information recording optimization in amorphous chalcogenides.