The starting point of this study is based on the supposition that the successive reforms carried out on the Spanish system of old-age pensions since the 1980s have altered both the intergenerational distribution of income and the risk of poverty for the elderly. The article will first outline how demographic factors and personal incomes affect the risk of poverty among the elderly. The second part focuses attention on the mediating role played by the social security system in the distribution of intergenerational income, and underlines how the adoption of a longitudinal viewpoint of the intergenerational positions helps us to understand the development of the risk of poverty among the elderly. The third part describes in brief the successive reforms that were carried out on the Spanish regime of retirement pensions. Finally, an analysis of the evolution of the personal incomes of the elderly and younger generations has been made, based on the data collected by the European Community Household Panel from 1994 to 2001. This analysis suggests that the reforms have increased the risk of poverty among the over-60s owing to a combination of two factors. On the one hand, there has been an increasing tendency among the over-60s to stop working completely, which has reduced job earnings especially for men aged between 60 and 70. Even more important has been the failure of public pensions to keep pace with the increase in the standard of living, though it is true that they have helped maintain the average purchasing power of the less well-off old-age pensioners