In post-industrial labor market, youth are confronted with precarious employment situations and periods of unemployment. Although changing labor markets have been thoroughly analyzed and youth political involvement stands high on the political agenda, few research have analyzed the consequences of labor market dualization on youth political attitudes. In this paper we seek to compare the effects of trade union membership for the political socialization of youth differently involved in the labor market. We propose to analyze differences in terms of political interest, political knowledge, and political satisfaction of unemployed youth, precariously employed youth, and regularly employed youth who are either members of trade unions or not. We hypothesize that trade union membership contributes most to unemployed youth political socialization. Moreover we compare youth living in four European cities (Cologne, Geneva, Lyon, and Turin).