Twelve promising genotypes of pea were evaluated under three environments (Kaliobia, Sohag and New-Valley) during two successive winter seasons (2021/2022 and 2022/2023 to estimate the parameters of genetic and phenotypic stability of some promising lines of pea with some cultivars widespread in Egyptian agriculture under three different climatic environments. The results showed that the lines No. 1, 2, 3 and 4 had the highest values in fresh pods yield (ton fed^-1) compared with the other lines or the check cultivars. Highly significant mean squares attributable to genotypes, environments, and genotypes environment interactions were found for all the characteristics under study, indicating that the genotypes may respond differently from one environment and year to the another.  The stability parameters (bi and S²d) for fresh pods yield (ton fed^-1) showed that about five genotypes tended to be stable across the studied environments. The regression coefficient (bi) and the deviation from the regression (S²d) both had insignificant stability parameters from unity and from zero. Lines No. 1, 2, 3 and 4 with a regression coefficient (bi>1) that is above average, potentially generate higher yield when environments are favorable and there is fertile soil, enough water, and other inputs. Four out of twelve genotypes had the highest fresh pods weight (ton fed^-1) over all genotypes. These genotypes were line No. 1 (4.557 ton fed^-1), line No. 2 (4.764 ton fed^-1), line No. 3 (4.135 ton fed^-1) and line No. 4 (4.901 ton fed^-1) and in the regions under study, they might be suggested for cultivation and given unique names as cultivars.