The aim of the paper is to describe the adjustments which should be made in the process of preparing Poland for participation in the euro zone. The process does not only mean a single fulfillment of convergence criterion concerning the budget deficit and public debt but the long-term recovery of the finance. It seems impossible to keep a high level of economic growth without an overall repair of public finance. The conducted research shows that the effective repair of public finance in Poland is essential not only as a necessary condition for using development prospects of the euro zone participation. It is also essential for improvement in international competitive position of Poland. A good condition of public finance combined with a stability of prices would constitute a good foundation of the increase in investment in economy including foreign investment.