In Belgium and France, the period from beginning of 1970s through early 1980s was pivotal for the change of trades unions` perception of migrant workers. This shift signifies that french and belgian trade unions no longer consider them as the part of “one sole working class.” It means their distinct characteristics are gradually appreciated. This awakening is closely connected with a social context, so called consumption society which requires mass production systems. In the post war period, a industrial restructuation goes along in this way and calls for migrant workers. In Belgium and France, automobile industry is a typical example of mass production systems which require a great number of unskilled workers. Their productive facilities are generally located in the urban area for labors and markets and this geographical relation leads more and more unskilled migrant workers to metropolis. In the urban space, the number of migrant workers has increased and more than ever, they became visible in the society. In this context, migrant workers` strike attracted wide attention in France and Belgium and consequently have a political and social significance more important than ever. The collective action of migrant workers in urban space reveal distinct characteristics of migrants workers` conditions and this changes trade unions policy and strategy on the immigration question. (Changwon National University/ shindongkyu@changwon.ac.kr)