Tekalign Afeta , Bulti Tesso , Dagnachew Lule Faba bean, genotypes, GGE bi-plot stability, yield 18-28 5 (1) 2021 January, 2021 Yield of a variety is the most complex trait and influenced by several factors. G x E interaction significantly influenced grain yield of faba bean suggested the presence of differentially adapted faba bean genotypes. Thirteen faba bean genotypes were evaluated at five faba bean growing areas of Oromia highlands during 2017/18 main cropping season with the objective of determining the magnitude and nature of G x E interaction for grain yield of faba bean varieties and to identify stable high yielding variety (s) under wide production for the tested environments and similar agro-ecologies. Combined analysis for grain yield revealed highly significant (P