A B S T R A C T Background and Objectives:The quality of flat breads depends in part on their textural and structural properties during storage. These properties are largely affected by flour quality. This research aimed at evaluating the textural and structural properties of Lavash bread types during storage by different techniques, comparing these methods, and determining the possible correlation between the obtained results. Materials and Methods:Three Lavash flours (named strong, medium and weak flours) with different physical, chemical and rheological properties were used. Determination of texture firmness of Lavash breads (Lavash A, Lavash B and Lavash C made of strong, medium and weak flours, respectively) during storage was carried out by Texture analyzer, evaluation of breads porosity and their changes process during storage was performed by ultrasonic nondestructive technique, assessment of the breads' microstructure was made by SEM, evaluation of starch gelatinization and retro-gradation was performed by DSC, and the sensory evaluation of breads was made by a trained panelist. All determinations were made in triplicate, except the sensory test that was performed in ten repeats, and mean values were presented.Results: Lavash B made from medium flour had less firmnness, lower transition of ultrasonic wave velocity, less value of elastic modulus, reduced value of enthalpy, lower average temperature, more pore diameter and area of images, and higher points of sensory evaluation than Lavash A and Lavash C breads during the storage time. The results of mentioned tests (devices and sensory tests) had significant correlation to each other.Conclusions: Desirable quality characterization and higher shelf life of Lavash B were due to flour qualitative characteristics of this type of bread to obtain dough with appropriate elasticity and excellent sheeting capability. Ultrasonic non-destructive method is recommended to use instead of other methods for assessing texture, cell structure and elastic properties of bread after baking and during the storage time. This method is fast, non-destructive and cheaper than other methods, and can be used during production.