We study a structure of polymer matrix when it filled by dispersed filler; in particular, we analyze corresponding modification (“disturbance”) of this structure that depends on fractal structure of skeleton of filler particles. Characteristics of such disturbance are described in term of general physical notions, namely, a variation in fractal dimensions of the structure df of a polymer matrix. It is shown from preliminary estimations that there is qualitative agreement between predicted values df and experimental data.