In this paper, we bring forth the question : are street youths activists ? It is a complicated exercise because first of all, that phenomenon seems improbable. The militancy of street youth is a theme that in each of its terms seems as much original and complex as paradoxical and controversial. This reflection is an opportunity to show that the street is not an area of social disengagement, but a space with a true creative function which leads to the possibility of activism. We then make assumptions about the context of engagement. Finally, we sketch the outline of a theoretical approach in terms of career from the complexities of individual choice commitments of street youths.