Two field experiments were carried out during the 2019-20 and 2020-21 seasons on a private farm in the west, El-Minia Governorate, Egypt, to evaluate the effect of using arbuscular mycorrhizal fungi (AMF) on promoting the efficiency faba bean cultivars cultivated in sandy soil to resist drought stress under drip irrigation system. The treatments of the experiment were composed of three irrigation treatments (I₁₀₀: full-irrigation, I₇₅: moderate drought, and I₅₀: severe drought), two inoculations [+] with AMF and [-] without AMF, and three faba bean cultivars (Giza-843, Nubaria-1, and Misr-1). Strip-split plot design in RCBD with three replications was used. The results indicate that (I₅₀) treatment significantly decreased leaf area index, No. of branches plant^-1, No. of leaves plant^-1, plant height, No. of pods plant^-1, 100-seed weight, No. of days from sowing to maturity, seed yield, and land use efficiency (LUE); increased water productivity (WP), economical water productivity (EWP), NPK%, and seeds crude protein SCP%, relative to (I₁₀₀) treatment, in both seasons. Inoculation with AMF significantly increased all studied traits of faba bean plants and improved nutrient and water uptake under drought-stress conditions. AMF increased seed yield by 19.34 and 24.19% compared to un-inoculation in the 1^st and 2^nd seasons. Giza-843 cv. gave the highest values of plant height, No. of pods plant^-1, No. of days to maturity, seed yield, land use efficiency, WP, EWP, and tolerance to drought stress. The 1^st and 2^nd order interactions were significant in most traits.