The aim of this paper is to analyse the mobility of per capita income distribution in the European regions during the period 1977-1996. In doing so we will attempt highlight some aspects of the nature of interregional inequality. Our methodological approach involves calculating different indicators commonly used in the dynamic income distribution literature. The results obtained show that the degree of mobility is relatively low within the distribution under analysis. In addition our empirical findings suggest a trend towards a reduction in regional mobility throughout the period of analysis coinciding with sustained interregional inequality in the European Union.