This study attempted to analyze the determinants of beliefs in conspiracy theories by constructing a more integrated model. However, it has several limitations. First, the analysis focused on political, psychological, and structural factors, but these three factors cannot fully explain beliefs in COVID-19 conspiracy theories. As the explanatory power of the full model, including all three factors, is 35.2%, it is necessary to identify additional important factors and variables for each factor. In particular, this study overlooks not only a lot of perception and communication factors [77,78,79], but also structure ones [80,81,82,83,84,85,86] and cultural value ones [87,88,89,90,91,92]. Second, this study measures beliefs in conspiracy theories by focusing on conspiracy theories related to the COVID-19 pandemic. Thus, analytic approaches are needed to compare our findings with findings related to beliefs in other, more general conspiracy theories.