The article presents an analysis of investment ties’ development of Poland and Baltic states. The author assesses general dynamics of foreign direct investment and identifies main stages and factors influencing FDI. The conclusion is substantiated that these countries continue to play the role of capital importers and there are no fundamental reasons for this situation to change. The author analyzes main disproportions of investment ties, including sectoral and territorial aspects, and identifies the common features and key differences of investment sectors of Poland and Baltic republics. Based on the calculation of Herfindahl-Hirschman index the change in the level of diversification of the sectoral structure of inward and outward FDI in Poland, Estonia, Latvia and Lithuania since 2010 has been assessed.