|Purpose: The purpose of this study was to identify the factors influencing suicidal ideation in male baby boomers. Methods: This was a descriptive survey study. Data were collected from December, 2012 to June, 2013 from 194 participants. The instruments used included a suicidal ideation questionnaire, somatic symptoms scale, spiritual well-being scale, communication with spouse scale, and social support scale. Data were analyzed using t-test, one-way ANOVA, Pearson"s correlation coefficient, and stepwise multiple regression analysis. Results: Suicidal ideation was influenced by learning needs on psychological coping, somatic symptoms, existential spiritual well-being, and communication with spouse. Somatic symptoms (β=.39, p<.001), existential spiritual well-being (β=-.20, p=.009), learning needs on psychological coping (β=.16, p=.008), and communication with spouse (β=-.15, p=.031) accounted for 37% regarding suicidal ideation in male baby boomers. Conclusion: We found an association of lower levels of existential spiritual well-being and communication with spouse, higher suicidal ideation. Higher suicidal ideation was also observed in people who had no learning needs on psychological coping compared with those who had. Based on the outcomes of this study, design of an intervention program that emphasizes existential spiritual well-being and communication with spouse is necessary in order to decrease suicidal ideation in male baby boomers.