This study was conducted to investigate the effect of some storage conditions for different periods (6 and 18 months) after harvest [two kinds of packages were used, high density polyethylene (H.D.P) and jute, with two forms of barley grains (grains and spikes), for five barley cultivars, Giza 123, Giza 126, Giza 127, Giza 128 and Giza 129) on the seed germination%, seedling vigor, seedling vigor index, viability and some seed quality parameters. The results revealed that, there was a significant increase in moisture content, electrical conductivity and acidity% with long storage time for both kinds of package and seeds form. Barley stored in spike form is more resistant than barley stored in grain form against the adverse effects of some storage conditions by decrease its content of moisture, electrical conductivity and acidity %. Barley seeds stored in spike form in both package recorded the highest values differences (P<0.05) compared with grain form, H.D.P used for storage barley grain avoid the previous disorders of storage conditions in the present study. Also, results recorded highly significant differences among the tested cultivars for all studied characters. Giza 123 achieved the highest values in all tested characters, while Giza 129 gave the lowest values. The results illustrated that, using (H.D.P) and spikes form would be avoid the adverse effect of increasing storage period up to 18 months of barley on seed viability and seedling parameters.