Trans Adriatic Pipeline (TAP; Albanian: Gazsjellësi Trans-Adriatik, Azerbaijani: Trans Adriatik Boru Xətti Greek: Διαδριατικός Αγωγός Φυσικού Αερίου, Italian: Gasdotto Trans-Adriatico) is a pipeline project to transport natural gas, starting from Greece via Albania and the Adriatic Sea to Italy and further to Western Europe.

The pipeline would be supplied by natural gas from the second stage of the Shah Deniz (Azerbaijan) gas field development in the Azerbaijani section of the Caspian Sea through the South Caucasus Pipeline and the Trans Anatolian Pipeline (TANAP). Since it will enhance energy security and diversify gas supplies for several European markets, the TAP project is supported by the European institutions and seen as a “Project of Common Interest” and a part of the Southern Gas Corridor.