As part of a research project on the reconfiguration of identity and gender relations in light of digital devices, following several previous studies, we presently examine the role of gender – as a variable through the notion of sex which is part of it but also as a concept – as well as that of social class in order to conceptualize their relations to information and communication technologies (ICT), and more specifically to expressive digital media (Social Network Services called SNS, wikis, blogs, etc.). Several dimensions must be taken into account in order to understand the relevance of these media in relation to gender identity and social class. On the one hand, the notion of « digital writing » is inherently relevant from this point of view because it unites two traditionally opposed universes. On the other hand, the expressive, or even expressivist character of these media (Allard 2009), suggests forms of culture and self-expression that lead the individual to a performance of identity (ibid.). After having elaborated on the contents of the gender system and how it can determine one's relation to technology and to ICT, we examine the ways in which social relations of gender and class condition the uses of contemporary expressive digital media, revealing their extremely gendered expressivism.