I use data from wave 6 of the Survey of Health, Ageing and Retirement in Europe (SHARE) to construct an individual-level index of active ageing for people aged between 50 and 90 years. Active ageing is defined as the "process of optimizing opportunities for health, participation and security in order to enhance quality of life as people age" (World Health Organization, 2002, p. 12). I use principal component analysis to esti- mate sub-indices for nine dimensions, which are then aggregated to the final index. This individual-level index allows to fully analyze inequalities between age cohorts, dimensions, countries, and other individual-characteristics that are covered by SHARE. In the eval- uation of the results I focus on potential gender differences. Overall women score lower than men with 54.9 index-points compared to 57.7. However, results are heterogeneous among countries. While in Sweden women score slightly higher than men, the biggest gap is found in Greece where men score on average 6.6 points higher then women. This thesis highlights the importance of a gender-perspective on ageing, taking life-course factors into account. The results are consistent with previous research and other macro-level indices on ageing.