Using library method and comparative analysis, this research deals with evaluating and comparing indexed scientific products of Iran, Turkey, Egypt, Pakistan, and Saudi Arabia based on WoS during the 5 years between 2003 and 2007. The most important objectives of this research include the comparison of articles of each country regarding ‘variety of language’, ‘variety of types of documents’, ‘subject areas’, ‘participant bodies’ and ‘number of articles and their growth rate’. Moreover, evaluation of ideality of performance of articles of these countries on the basis of the mingled indicator of “Average Gross Domestic Product (GDP) in comparison with the Indexed Scientific Products” is another issue discussed in this article. The results show that although Iran is placed between Turkey and Egypt regarding its number of articles in WoS, it is placed after these two countries considering its performance of indexed scientific products in WoS.