The objective of this investigation aim was to evaluate twenty barley genotypes under different environments for testing stability of their performance. Where, development of any crop genotypes with adaptation to changes is one of most important goal of breeding program. This study examined twenty barley genotypes over different three environments; normal, water stress and salt stress. The normal and water stress experiments were conducted at Sakha while salt stress experiment was conducted at the El-Hosinia station during two seasons (2014/2015 and 2015/2016). The combined analysis of variance for environments, genotypes and (Genotypes x Environments) interaction was highly significant for all studied genotypes, suggesting differential responses of the genotypes and the need to stability analysis. Results revealed that highly yielding genotypes can also be stable. Giza 133 and Line 7 had desired performance (grain yield) compared to the grand mean, regression coefficient (b_i) did not differ significantly from unity and had low deviation from regression (S²d) values, indicating the role of linear portion of G x E interaction in the performance of these genotypes. Giza 130, Line 4, Line 5 and Line 8 had the lowest (b_i) values which were more adapted to unfavorable environments, whereas Giza 132, Line 3 and Line 6 were input sensitive and adapted to high potential environments.