SummaryThe concept of fundamental breach in international sales contracts is a pillar of President in the texts of the Vienna Convention for the holding of international sales, particularly in the sanctions and compensation, which seems to be Eetmouka on all areas of this agreement, whether the provisions relating to Seller or relating to the buyer such as text on avoidance in Article 49 / 1 / a and Article 51 / 2 and Article 64 / 1 / a and Article 72 / 1 and Article 73 / 1 as well, it's about to deliver the goods alternative provided for in Article 46 / 2 in addition to attachment to the transfer of risk of loss provided for in Article 70, as well as the concept is the base Anticipatory breach indicated to him that the Convention in Article 72, as well as big an impact on the issue of delivery payments provided for in Article 73, it turns out that the concept of fundamental breach is of key importance in the legal structure of the Vienna Convention for the international sale contract where it occupies the vast area.