This paper focused on the role of mass media in promoting anti-corruption campaign on elections and vote-buying syndrome in the Political process in Nigeria. The background recognized the important of elections in the political leadership of democratic nations. The statement of problem is anchored on the widespread of irregularities in elections and vote buying in Nigeria. The objectives of this paper are to find out the extent to which the mass media promote anti-corruption campaign on elections and vote-buying in Port Harcourt, examine how the electorate perceives media ant-corruption campaign messages on election and vote buying in Port Harcourt, find out the implications of vote-buying in Nigerian democracy. The theoretical framework for the study is anchored on the Clientelism theory while the study adopted the survey method in showing how the electorates respond to media anti-corruption campaign messages on elections and vote-buying. The study used population of 3,171,000 which covered the entire Port Harcourt, with a sample size of 400, using purposive random technique. The study used questionnaire as instrument of data collection. The findings of the study reveal that electorates are been induced against their choice to vote for candidates they do not know or want. The study concluded that vote-buying on elections is a menace that triggers corruption and undue influence on the electorates and recommended for aggressive media anti-corruption campaign for good governance and accountability. Also, the media should adopt Agenda-Setting Theory in promoting and educating the electorate on the anti-corruption campaign on election and vote-buying in Nigeria.