Corruption danas predstavlja globalni problem i jednu od najvećih pretnji demokratskom državnom poretku i vladavini prava. The paper points to the criminological and legal aspects of corruption in Croatia and Serbia as countries that have somewhat completed the transition process, society reform and harmonization of legislation with relevant international documents. Provided are the most significant international and national legislative sources that are important for the suppression of corruption, as well as the mechanisms for monitoring the presence of corruption in these countries. A study of the state and movements of corrupt criminal offenses committed in Croatia and Serbia was conducted and their comparative representation was given. ...