The study is set out to examine television as an instrument for 2019 electioneering campaign in Nigeria because post election reports and responses from observers indicated that 2019 presidential campaign was characterised by the hate campaigns while the serious ones kept to the rule of game. The study is anchored on three theories i.e Agenda Setting, Social Responsibility and Democratic Participant Theories respectively. Survey research method was adopted while structured questionnaire was also employed to elicit responses from 200 respondents that were purposively drawn within strategic places in Lagos out of which 180 copies that were correctly filled were analysed using frequency and percentage table method with SPSS version 20. Findings show that television was used to educate and sensitize voters during 2019 general election in Nigeria while political parties and candidates observed their campaigns on television which influenced voting pattern of electorates and by extension TV was a change agent for electioneering campaign in Nigeria. It is recommended that media should be conscious of what they do to maintain their credibility and integrity, therefore, media should be sensitive to national interest and social responsibility while broadcast media should be free from few influential politicians to avoid turning the media into tools of propaganda.