This paper investigates the function of windcatchers in dry regions in Middle East and compares them in different fields in two areas including Yazd-Iran, and Egypt. The study exامینes windcatchers in these areas in terms of cooling system and forms, with different plans, forms, constituent components and decorations.Reassessment of windcatchers in these areas can shed light on these differences. Survey was carried out by systematic comparison sampling. Comparison of windcatcher components and performance in two areas of the Middle East can result in a comprehensive understanding of the differences in these two areas. However, to keep factors affecting windcatcher components constant, two windcatchers in two similar regions are investigated.Case comparison between windcatchers in Iran and Egypt in terms of the constituent components can be informative about the windcatcher architecture in two regions with similar climates and different cultures and can give us general knowledge of the issue. Findings of the research have shown that windcatchers have formed a cooling system in the Middle East traditional buildings and their primary function is conditioning using the wind renewable energy. The cooling system works in two ways: through displacement and displacement and evaporation. The latter has been particularly used for hot and dry climate. In hot and arid regions of the Middle East, the windcatcher shapes were determined according to the prevailing wind direction.
