The study is focused on sociological aspects of corruption. The author provides theoretical definitions of corruption based on sociological literature, explains the existence of clientelism and relations between corruption and social capital. Firstly, the author gives definition of corruption from four classical sociological aspects, the so-called public-office, public interest, market centered definition and definition derived from international treaties. The author provides modern theories of corruption developed by Ch. Hoffling and explains corruption in processes of social interaction, where the corruption is characterized as social relation, social process and finally as socio-economic net. Paper looks at corruption also from economic view according to economist Gary Becker, sociological view according to ideas of Max Weber and deals with social interdependence of economic behavior and economic interdependence of social behavior. Within the next chapters the author looks at corruption from the perspective of value s conflict, and deals with inequality and low social capital. Author suggests that corruption is one of outcomes of habitués of a modern citizen. Finally, author elaborates on corruption in post-communist countries and argues corruption emerged because of changes in societal structures.