In this paper we describe structural changes of the Polish economy which occurred over a five-year-period from 1995 to 2000. This is an important topic since Polish model of transition process from centrally planned to market economy, which started in 1990, was the first in Central and Eastern Europe. We found material flows (and partly intermediate demand) to be relatively stable in the considered period in the traditional Polish industries like mining. Our analysis also concerns with changes in value added, finał demand and international trade balance of the Polish economy in the period under consideration.