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Thesis/purpose of the article – The article recalls the historical circumstances in which the Polish Librarians’ Union joined the IFLA in 1928. It describes the contribution of Polish librarians to the work of this organisation, especially to its annual sessions and also to the work of its subcommittees. Methodology – the primary source used is IFLA’s main publication, Actes du Comité international des Bibliothèques. Polish sources and documentary materials were also used. Results/conclusions – Poland joined the IFLA at an early stage, which allowed our country to follow global tendencies in library practice, and to implement some of them domestically. Poland’s contribution to IFLA’s work was not very significant, as at that time the Polish librarians’ community was in its formative stage, following the period of the country’s partition, and its intellectual centres had not developed yet.