The article presents an analysis of the relationship between the rate of unemployment and investment outlays not, as usual, on a country basis, but for individual voivodeships (administrative regions of Poland). This approach made it possible to find some specific features of the influence of investment on unemployment in a variety of cases. Several types of models were evaluated in representing the relationship of the rate of unemployment and the index of investment outlays per person actively employed. Best results from a statistical viewpoint were obtained for linear models. These were used to discuss: (a) the intensity of changes in unemployment in the analyzed relationship to investment; (b) the initial situation (starting points) with regard to unemployment; (c) substitution between the starting points and intensity of change of the rate of unemployment as related to the index of investment; (d) the effects of hysteresis in unemployment in the years 2000 - 2001. Attention was also given to the phenomenon of the investment wedge to unemployment and grouping of voivodeships was made according to the types of relationship between unemployment and investment.