The aim of the study is to examine the evolution of tax morale in Turkey within a 22-year period. The data obtained from the World Values Survey were evaluated in the Stata 13 statistics package program. As a result of the analyses through ordered probit models, it was observed that the level of tax morale had changed over the course of time. Tax morale level was lower between 2007 and 2012 than in the year 1990. In addition, the research findings indicate that levels of confidence in bureaucracy and financial satisfaction levels have an effect on tax morale. According to estimated results, confidence in the government, as well as the importance of religion and national pride, all have a significantly positive effect on tax morale. The results of the study show that governments and policy makers must pay more attention to the tax morale issue in order to increase tax revenues along with tax compliance.