The suicide rate for ages 15-24 increased recently in South Korea. The purpose of this study was to understand the suicidal ideation using the qualitative content analysis in South Korean college students. The data were collected with non-structured open questions in 134 college students and were analyzed with qualitative content analysis. The collected materials were classified 2 categories, 6 themes, and 21 theme clusters. Two categories are emerged: (1) facilitators of suicidal ideation, and (2) inhibitors of suicidal ideation. This study identified that the facilitators of suicidal ideation are physical, psychological and societal concerns, and suggested that the inhibitors of suicidal ideation are influenced by religious and cultural context. These results presented that Buddhism and Confucianism had influence on reasons to not attempting suicide behavior as the inhibitor of suicidal ideation. In conclusion, cultural context should be considered to develop strategies for the suicide prevention in South Korean college student.