The number of cross-border workers in Luxembourg has steadily increased for over thirty years. In the collective imagination the cross-border workers come to the Grand Duchy just to work. The purpose of this article is to overcome this representation by measuring the integration of cross-border workers in Luxembourg could . By using the concepts of Social and Time Geography, it is possible to analyse their living spaces according to the spatial and temporal organisation of their daily activities and trip chains. The spatial distribution and the organisation of the activities on both sides of the border form the methodological and analytical support for this paper. The juxtaposition of these trip chains with the living spaces allows identifying and characterising the degree of spatial integration of cross-border workers in Luxembourg.