This paper looks at the mobilizing effect of personal networks on the individual propensity to favour some types of political participation over others, in a context of changing participation repertoires. We rely on original egocentric network data gathered via a unique online survey conducted among a quota sample of 2801 Belgian citizens. We show that dominant political behaviour(s) in a network diffuse as byproduct of social proximity and influence: the more someone has been exposed to a certain type of participation in the past, the more this person is likely to be recruited in the same type of participation in the future (engagement), or, if this person was already active, to retain the same participatory behaviour (retention). Moreover, our results point to a cross-over dissuasive effect across types of participation that keeps citizens away from certain participatory behaviours. In particular, exposure to online and instiutionalized participation in their personal network decreases respondents’ likelihood to engage in non-insitutionalized participation. Overall, we stress the added-value of a meso-level approach that embeds citizens in their personal network to understand their participatory choices. ; SCOPUS: ar.j ; info:eu-repo/semantics/published