As the 19th Korean presidential election was held within a short period of 60 days, researchers began to hypothesize that voters were more likely to lean towards a particular candidate based on the leadership image of the presidential candidate, which may be influenced by an election poster rather than thorough examination of the candidates' qualities and policies. The results of this study, conducted on 190 university students of K university in Seoul, showed that the election posters of each presidential candidate 1) had a positive effect on the leadership image of every respective candidate, 2) had a positive effect on leader trust of all candidates except for Hong Joon-Pyo, and 3) had a positive effect on leader selection only in the case of Moon Jae-In. Furthermore, the leadership image of each presidential candidate differed according to the support propensity of the respondents. In particular, the leadership image of each presidential candidate perceived by respondents has a positive effect on leader trust, and leader trust has a positive effect on leader selection. The results of this study suggest that an election poster is a major factor affecting leadership image, leader trust, and leader selection of presidential candidates perceived by voters. The result of this study is expected to provide important basic data for establishing an effective electoral strategy for voters in the future.