The Trade Union Solidarity Centre of Finland SASK is the solidarity and development cooperation organization of Finnish trade unions. SASK has several dozens of development cooperation projects in Africa, Asia and Latin America. Approximately 1,7 million Finns belong to SASK through their trade unions.

SASK was founded by the Central Organization of Finnish Trade Unions and it´s affiliated unions in the end of the year 1986. Since then, SASK has become a widely representative solidarity body of the Finnish trade union movement with two central organisations and 30 national federation as affiliated members.