Magyar Szakszervezetek Országos Szövetsége (National Confederation of Hungarian Trade Unions) - MSZOSZ, the most important Hungarian Trade Union, organising workers of many industrial and services sectors. Confederation headquarters are in Budapest and the Confederation is a trade union confederation of equal and autonomous national professional, industrial and sectoral unions or their national federations.

It was formed in 1990 and has a membership of 465,000 active members and 250,000 pensioners and apprentices.