After nearly two decades of postponement, the Trans-Saharan Gas Pipeline Project, which extends more than four thousand kilometers to export Nigerian gas to Europe via Niger and then Algeria, has returned to the forefront again with the announcement of the start of completion work in the Algerian part. This huge and expensive project comes in the context of Europe's search for new sources of energy and amid rapid geopolitical transformations. On the other hand, he faces challenges related to financing and security, as well as competition from another project linking Nigeria and Morocco. To what extent can this pipeline change the gas map between Africa and Europe?