The volunteering of seniors is quite a new idea in Poland and raises a lot of controversies even among seniors themselves. Volunteering is more popular among young people. The young generation which is considered to be active on the vocational, educational and family fields has one more social task - volunteering. The elderly people – retired, who have more free time to do different things, also want to be active citizens but are identified with passive role in the community. The aim of the article is to present a fragment of social world. The article is divided into two parts – theoretical and empirical ones. The first part presents idea of three models of learning: learning to get old, learning by being old and learning in later life, theoretical discussion about formal, non-formal and informal volunteering in the context of activity of seniors (referring to University of the Third Age as the example of non-formal volunteering of seniors). The other part presents analyse of the data collected from the seniors’ volunteers from “Foundation of Active Senior” presenting volunteering as the space of seniors’ learning.