The research aims to explore the cultural values that constitute the behavior of Egyptian urban users and the extent of its suitability to the values of sustainability. Most urban sustainability processes seek to change and transform the behavior of urban users into sustainable behavior, which depends on a specific set of values that must be present in the culture of every society in order to achieve the sustainability process in it. These values are summarized in: (respect for the environment, freedom and democracy, justice and equality, tolerance, sharing responsibility). Despite the efforts made for urban development in Egypt, Egyptian urbanism suffers from many environmental, social and economic problems that explain its unsustainability. Therefore, the research assumes that the unsustainability of Egyptian urbanism results from the lack of harmony in the behavior of users resulting from their cultural values with the values of sustainability. This is evident from the urban problems in the city of Zagazig. The descriptive analytical approach is used to monitor and analyze the current cultural situation and its impact on the formation of Egyptian urbanization, by presenting some of the changes that have taken place in the culture of Egyptian society since the middle of the twentieth century until now, and comparing the current cultural values of society with the values of the principles of sustainability. And the impact of user’s behavior and values on the sustainability of the current Egyptian urban, as is evident in the case of the city of Zagazig.