On the basis of the measurements on plots laid out in the 70s of this century in stands of ecological-managerial forest type II-G-20, Genisto elatae-Quercetum roboris Ht. 1938 and measurement data on the same plots from the 1995-1997 period, it is possible to have an insight into the oscillations of the tree number distribution, d.b.h. distributions, basal areas and volume distributions. By biometrical processing of the measured data (number of trees, heights, d.b.h.) and resulting amounts (basal area and volume) of the first and the second measurement and by their comparison, we will present the changes that occurred in the structure of these stands from the 70s up to the present on the territory of Western and Eastern Slavonia.