This paper aims at examining how secondary teachers’ religions nd spirituality affect on their educational ideologies and conflict handling styles. For its case study, this paper looked at 204 secondary school teachers working around Gyonggi-do Province. The 204 participants consist of 90 male and 114 female teachers in middle or high schools. This study started from these three questions: Firstly, does teachers’ religions affect their spirituality at all? Secondly, do teachers’ religions have an effect on their educational ideologies and the styles of dealing with conflict? Thirdly, is teachers’ spirituality actually correlated to their educational ideologies and conflict handling styles? For the answers to those questions this research has found the followings: Firstly, the Protestants and the Catholics feel more religious well-being than Buddhists and No Religion Group, while the Catholics feel more existential well-being than No Religion Group. Secondly, the Protestants have the greatest tendency of educational fundamentalism, while the Buddhists have the least tendency of educational fundamentalism, intellectualism, and conservatism. Thirdly, when it comes to conflict handling styles, the Protestants tend to be the most competitive, and the Catholics the least. Besides, No Religion Group has turned out to be the least adaptable, negotiable and cooperative. Fourthly, spiritual well-being is noticeably associated with fundamentalism and intellectualism, and existential well-being with educational conservatism and liberal ideologies. Fifthly, religious well-being is emotionally correlated with cooperation, adaptation and negotiation. In contrast, existential well-being is substantially relevant to cooperation and negotiation in terms of conflict handling.