Politicians play a big part in world affairs, and their decisions are of the high importance and reflect on the lives of the people of the state in which they work, and often and wider, so it is not surprising that politicians are expected to be a model in a moral sense. Despite expectations, at least as far as the Republic of Croatia is concerned, statistics show a growing corruption in the state and the dissatisfaction of citizens who blame politicians for such a situation. That is why the target population in this research were politicians, and the aim of the research was to verify the relationship between the dark triad personality (macchiavelianism, narcissism and psychopathy), ideological orientation and moral decision-making in politicians and non-politicians. The study was attended by 140 participants (76 politicians and 64 non-politicians) at the age of 24 to 65. The research was carried out at the end of 2017 and early 2018, so people actively involved in politics were asked to participate by email that include appropriate web address containing research materials that included: General Data Questionnaire, Questionnaire of the Dark (Jones and Paulhus, 2012), Questionnaire of General Ideological Orientations (Proroković, 2016), and the Test of Moral Decision-Making (Gregov and Tokić, 2017). After collecting data on a sample of politicians, research was conducted on similar sample of individuals (by relevant sociodemographic characteristics) who do not deal with politics. Unlike most studies so far, the results obtained do not show that politicians point out any personality trait involved in the dark triad in relation to a sample of non-politicians. As far as ideological orientation is concerned, politicians are more left-oriented when it comes to the social domain of ideological orientation, but the attitude on the economic domain of ideological orientation is not different from that of non-politicians. Politicians also achieve a significantly higher index of moral decision-making than non-politicians. In general, individuals who have higher results on the faces of the dark triad are also more right-oriented and achieve a lower moral-decision making index. Individuals who are more left-oriented show a higher index of moral decision-making than those who are more rightoriented. Finally, hierarchical regression analysis has distinguished three significant predictors of moral decision-making, which is age, macchiavelianism and subclinical psychopathy. Namely, older individuals and those who have lower scores on the scale of subclinical psychopathy and macchiavelianism show a higher index of moral decisionmaking.