The results of evaluation of the fluctuating asymmetry of the leaf blades of Betula pendula from different parts of Barnaul are presented in the article. The variability of asymmetry of morphological traits and common FA levels of leaves is found out. It can be influenced by various reasons among which the anthropogenic factor is the most probable one. The most revealing morphological features of leaves were the width of half-leaf, the length of the second leaf vein from the leaf base and slope angle of the second vain to the central one.