This study analyzed how world history textbooks describe religious reformations. For this, 3 textbooks published by Kumsung, Chunjae, and Bisang either in 2009 or 2015, were comparatively analyzed in terms of five domains, namely a) the backgrounds of religious reformations, b) Luther’s Reformation, c) Calvin’s Reformation, d) the religious reformation of England, and e) the results and effects of religious reformations. The results were as follows. First, historical facts were simply enumerated, demanding memorization rather than understanding from students. Second, the description of Luther’s Reformation was longer than that of any other religious reformation while there was very little information about Calvin’s Reformation despite its significant impacts. In addition, the causes and effects of religious reformations were depicted from imbalanced perspectives. Third, even though religious reformations were not restricted to religious areas and were the important events that opened up the modern Western society, the quantity of related contents was severely reduced simply because they are religious events. On the other hand, the religious significance of the reformations has been deleted, but only the political significant of the events has been highlighted; therefore, there was no explanation about the effects of religious reformations on the values of democracy and capitalism or freedom and equality, which were essential to the subsequent development of the modern Western society. Therefore, an alternative would be to make meaningful and coherent connections between the religious reformations and historical facts in world history textbooks. Second, balanced descriptions of each detailed topic are needed. Third, it should be described that the core ideas of religious reformations were not limited to religion but affected modern ideas.