This article brings together two debates in contemporary political philosophy: on the one hand, the dispute between the distributive and relational approaches to equality and, on the other hand, the field of intergenerational equality. I offer an original contribution to the second domain and by doing so, I inform the first. The aim of this article is thus twofold: shedding some light on an under-researched and yet crucial question – ‘which inequalities between generations matter?’ and contributing to a far-reaching debate (...) that touches upon the nature of egalitarianism. After showing that there are two key problems that fall within the scope of intergenerational equality – questions of justice between age groups and questions of equality between birth cohorts – I argue that, contrary to what the default distributive view states, some inequalities between age groups matter independently of their diachronic impact, and so partly for relational reasons. I argue that, even if we are distributive egalitarians, we must endorse the relational egalitarian conception to successfully make sense of some inequalities between age groups. I infer from this both that the putative view that the ‘relational’ conception of equality can be redescribed as distributive must be rejected and that the distributive view requires supplementation by the relational view. (shrink)