The article deals with the history of the emergence and activities of the clerical Christian Workers' Union of Finland during the 1905–1907 revolution. It analyses the Union's programme, numbers, social composition, organisational structure, goals and objectives. It shows the peculiarities of the formation of the ideological paradigms of the Union, which were a peculiar combination of Christian dogmas about equality and socio-economic and political demands of the part of the working class that saw the Christian faith as the basis of human existence.