The European area is complicated because states lack the same degree of territorial integration. Thus, the European Union does not correspond to the Schengen area or monetary union called eurozone. European borders are not the same quality. Notwithstanding this diversity, the majority of states have signed and rattifié the Madrid Convention of 1981 for new cross-border cooperation. The Interreg, Objective number 3 from 1st Jan 2007 to allow project leaders to receive a financial contribution from the European Union. From the study of Interreg records, especially for dyads Franco-British and FrancoBelgian, we seek to define the spatial effects of crossborder institutions. Phase 1 to Phase 3 program Interreg cross-border networks products have evolved. The project leaders are increasingly structured. The productions are real space, but locally, the thinnest, is not the generator of space innovation over the medium term.