This specialist thesis deals with lobbying, corruption and the difference between lobbying and corruption. The purpose of this paper is to explore how well the public is aware of the boundary between lobbying and of corruption activities, and therefore the definitions of lobbying are given at the beginning of the paper, because it is still quite unrecognized in Croatia. The methodology of lobbying, of sorts, is clarified lobbying and who lobbies everything. It is important to note that all, not just interest groups and lobbyists are lobbying customers. It also draws attention to the fact that citizens can engage and influence themselves to one's decisions, laws, or the very subject of lobbying. Also, corruption is defined as yes would clarify what it is at all. The aim of the paper is to warn that if laws are violated, lobbying goes into corruption and that lobbying should be regulated and determined Constitution. Lobbying is identified as corruption and there are possible reasons. Besides, the regulations in the United States, the European Union and Croatian. The paper examines the awareness of Croatian citizens about demarcation between lobbying and corruption. Based on the questionnaire method, it was determine that citizens are aware of the boundary between lobbying and corruption and the affairs of the area, but not that there should be legislation. It can be concluded that with the lobbying they are in the public is still bound by the negative connotations, so in the future it should be sought that anti-corruption measures are even stronger, and lobbying is regulated