In systems governed by contemporary democracy, investigating the factors influencing voter behavior remains an enduringly important agenda item. This is because understanding what influences voters and what does not is one of the most crucial issues for political parties and leaders aspiring to come into power. In this regard, there are numerous socio-economic reasons that influence the variability of voter support for political parties, leading to fluctuations in support for these parties. These changes are most visibly observed in election results. Voter behaviors, which result from complex interactions, often do not rely on a definitive prediction. Especially in today's political climate, certain leaders of specific political parties have become significant figures who capture the attention not only of their own party members but also of broader masses. These leaders have not only created a gravitational pull through their political actions and discourse but also through their personal characteristics. Some voters, due to the personal charisma and vision of these leaders, tend to vote for these leaders rather than being loyal to their parties. On the other hand, some voters tend to associate these leaders with their parties and align the leader's image with the party's policies. The perceived image of these leaders in society can play a decisive role in shaping attitudes towards political parties. Particularly, understanding whether the leader's image plays a regulatory role in this influence when evaluating the impact of a significant concept such as secularism on attitudes towards a political party is of great importance. Furthermore, some party leaders are more prominent than their parties due to their actions, discourse, and characteristics. While some voters vote for a party solely because of these leaders, others identify the leader and the party together. The perceived image of these leaders can be decisive in influencing the factors that affect attitudes towards the party. In this context, the focus of the study is to examine the regulatory role of the leader's image in the influence of secularism on attitudes towards a political party. To achieve this goal, a research was conducted on individuals aged 18 and over living in Tokat (n=396). The convenience sampling method was used in the research. SPSS PROCESS Macro was used to analyze the obtained data. In this study, four parties (AK Party, CHP, İYİ Party, Saadet Party) were included to examine the regulatory role of the leader's image in the influence of secularism on attitudes towards a political party. When selecting the parties to be included in the study, the parties' statements on secularism and anti-secularism were taken into account. Accordingly, CHP, as the party that most intensively uses secularism discourse, and Saadet Party, as the party that gives the most emphasis to anti-secularism discourse, were included in the study. AK Party and İYİ Party, on the other hand, were included in the research as two parties with discourse targeting both secular and conservative voters. In other words, parties that heavily use secularism and conservatism in their discourse and parties that are more moderate on these issues were included in the research. In addition to attitudes towards the Justice and Development Party (AK Party), the Republican People's Party (CHP), the İYİ Party, and the Saadet Party, the study also examined the perceived image of these parties' leaders. As a result of the research, it was determined that secularism has a positive effect on attitudes towards the AK Party, and Recep Tayyip ERDOĞAN's perceived image plays a regulatory role in this relationship. Furthermore, it was found that in the influence of secularism on attitudes towards the CHP, Kemal KILIÇDAROĞLU's perceived image plays a regulatory role. Finally, it was concluded that in the influence of secularism on attitudes towards the Saadet Party, Temel KARAMOLLAOĞLU's perceived image plays a regulatory role. It was also determined that secularism does not have an effect on attitudes towards the CHP, İYİ Party, and Saadet Party. Additionally, in the influence of secularism on attitudes towards the İYİ Party, Meral AKŞENER's leader image does not play a regulatory role. [ABSTRACT FROM AUTHOR]