This subject provides an introduction to and an analysis of the main provisions of the UN Convention on Contracts for the International Sale of Goods 1980 (CISG), an examination of certain practical, theoretical and methodological issues concerning the proper construction and application of CISG as the uniform international sales law, and a basic comparative analysis between selected provisions of the CISG and Restatements of International Contract Law (i.e. the UNIDROIT Principles of International Commercial Contracts 1994 and the Principles of European Contract Law 1998), in order to determine how and to what extent consideration of general principles of international commercial law could aid in the proper interpretation and application of the Convention as the uniform international sales law – a positive step towards substantive legal uniformity.