This research studied the effect of titanium dioxide nanoparticles (TiO2NPs) on faba bean plants grown under salinity stress. Plants exposed to two different salinity levels (40 and 80 mM NaCl) were treated with two different concentrations of TiO2NPs (5, 10 ppm) during the growth period. Data showed that the high salinity levels decreased the plant height, fresh and dry weights of the shoots by (12.4 %, 37.2 %, and 34.8 %) respectively, as well as decreased Chl a, Chl b, Total Chl, and carotenoids content by 43.7 %, 45.7 %, 44.2 %, and 12.1 % respectively compared with the control. The application of TiO2 NPs at (10 ppm) significantly improved faba plant height, fresh and dry weights of the shoots by 10.9 %, 67.3 %, and 33.4 % respectively, as well as significantly enhanced Chl a, Chl b, Total Chl, and Carotenoids by 58.8 %, 19.7 %, 47.6 %, and 37.7 % respectively compared with the untreated plants. It could be concluded that spraying plants with TiO2NPs at the two used concentrations mitigated the harmful effects of salinity on faba bean plants.