International audienceThis paper aims at analysing the process of regionalisation, i.e. the formation of large geographical ensembles or macroregions. Inside these macroregions, the international trade tends to increase faster than at the global level. What are the most relevant indicators to determinate their geographical limits? In order to answer this question, the paper proposes the analysis of the commercial relations between European Union and Russia until 2004. Is Russia involved in the regionalisation process? Does it progressively enter the economic region dominated by the European Union? The first part of the paper shows that the supposed process of regionalisation must be qualified, as far as the relation between Russia and EU ar...