This study was conducted to assess the variables that influence suicidal ideation among university students and thus provide valid materials for effective suicide prevention programs and counseling. A total of 310university students were used as subjects to verify the influence of spiritual well–being and depression on their suicidal ideation, followed by examining differences when the subjects were divided into Cristian and non–Christian group.The findings first revealed that Cristian group had lower level of suicidal ideation than non–Christian group, but it doesn’t have meaningful statistical difference. Second, Analyzing religious well–being and existential well–being individually revealed that religious well–being has an influence on suicidal ideation in the Cristian group only while existential well–being does in both groups. Third, when religious well–being, existential well–being, and depression were analyzed altogether, only existential well–being has an influence on suicidal ideation in both groups. Fourth, the direct effect of existential well–being is higher than that of depression in both groups. Based on these findings, the study went on to offer discussion and suggestions.