Abstract. The paper presents an analysis of the variability of yield structure traits and lodging resistance of 32 spring barley mutants. The mutants were obtained from the DH line HK-119 using a chemomutagen N-nitroso-N-methylurea (MNU) and helium-neon laser. The mutants were chosen in such a way that they represented a broad spectrum of plant height. The investigation allowed mutants with improved parameters of yield structure in comparison to the initial form HK-119 to be selected. The analysis of morphological and physical traits - stem diameters, wall thickness and stem elasticity (Young's modulus) - made possible the relationship be-tween these traits and lodging grade to be estimated. The lodging grade was assessed in field conditions on a 9 degree scale, where 1 means no lodging and 9 the highest degree of lodging. Mutants of different plant height, with desirable yield structure and improved lodging resistance, were identified.