Consumer ethnocentrism is an important factor that has an impact on the purchasing decisions of consumers. Consumers who tend to buy their own domestic products have high ethnocentrism tendencies. The reason for some consumers having tendency of high ethnocentrism has been the subject of many studies. On the other hand, there are many elements related to ethnocentrism. Socio-psychological factors affect ethnocentrism. Socio-psychological factors such as patriotism, collectivism and cultural openness are among the antecedents considered within the scope of this study. The sample size of the study is comprised of 472 individuals. All participants are over the age of 18 and they all reside in Nevşehir. Performed analyses indicate that ethnocentric tendencies of consumers are positively affected by patriotism and collectivism factors, and negatively by the factor of cultural openness. Key Words: Ethnocentrism, Consumer Ethnocentrism, Ethnocentric Tendencies, Socio-Psychological Factors.