Drought is the most important abiotic stress in the production of common bean (Phaseolus vulgaris L.), which is one of the most cultivated crops in the world. The aim of this study was to monitor physiological changes in different traditional bean cultivars by simultaneous measuring shoot conductivity and chlorophyll fluorescence and using these changes to assess the resistance of different cultivars under drought stress conditions. Four traditional common bean cultivars were used for the experiment: 'Biser', 'Puter', 'Trešnjevac' and 'Zelenčec' which are grown from seed. After the first leaf developed, 10 plants of each cultivar were transplanted into containers with sand and watered. The control plants (half of the plants) were constantly watered, while the drought treatment plants were not watered for 10 days. Stomatal conductance (gsw), boundary layer conductance (gbw), total stomatal conductance (gtw), transpiration (E), effective quantum yield of PSII (ΦPSII) and electron transport rate (ETR) were measured every 2 days with the LI-COR LI-600 porometer/fluorometer. The results show that the cv. Biser is more drought resistant compared to the other studied traditional cultivars, because it maintained higher stomatal conductivity, higher transpiration rate and higher ETR in the drought treatment.