This article examines the features of the Greek tourism as well as the position of the tourism of the Balkan and the Eastern European Countries, in the world –wide and the Greek tourism. Until 1990, the collaboration of Greece and the Balkan and South Eastern European Countries, in the sector of tourism, was being developed under the conditions of incompatibility of their economic systems with a resulting limitation of their tourist exchanges. During the first years of transition, the specific economic and social problems became suspending factors in the tourist development of the region. Gradually, however, the tourist sector was being developed and the trans-regional tourist cooperation was being strengthened. The further developing of the collaboration and the joint tourist advantages are going to contribute to the strengthening of the position of the region and each country separately in the world tourist market.