Transnationalism of first-generation migrants, usually considered as a core element of their migratory projects, is nowadays taken somewhat for granted. Our aim in this paper is to examine empirically the relations of transnationalism with duration of residence and integration of Eastern European migrants in Italy, a country which evolved into a mass immigration one since the 1980s. Data come from the Integrometro survey 2008-2009, encompassing more than 4500 Eastern European migrants. We chose this group of migrants because East Europeans now constitute half of the foreign population in Italy and these nationalities have been overlooked by migration research on transnational topics. Our results show a positive relationship between migrants' economic integration and transnationalism, suggesting that economic resources facilitate the maintenance and development of cross-border ties. Being more integrated socio-culturally, however, is accompanied with weaker transnational practices. Moreover, the level of transnational behaviour decreases the more years Eastern European migrants spend in Italy, which cannot be fully attributed to a higher level of socio-cultural integration