The aim of the paper is to investigate the connection between the Frankfurt School and the events of 1968. Accordingly, the paper focuses only on those important members of the School whose philosophical, ideological or practical influence on the events is clearly detectable. This means dealing with four thinkers in three sections: the influence of Adorno and Horkheimer is treated in the same section, whereas the work of Marcuse and Habermas is examined in separate sections. The three sections represent three different approaches. Adorno and Horkheimer are passive onlookers of the events their passivity being rooted in their skeptical philosophical thinking. The initially also passive and pessimist Marcuse slowly rises to the role of the ’prophet’ of the students. And the early Habermas’ critical analysis paves the way for his initially pessimist, but later more optimistic reformist attitude. The paper is structured accordingly: after introductory thoughts, the mentioned thinkers are treated in separate sections that contain historo-philosophical analysis of their relevant works.