Purpose: This study was conducted to identify factors that influence the suicidal ideation of the unemployed. Methods: Participants in this study consisted of 207 unemployed individuals from G city those who were participating in activities in a job center. A survey was conducted from June 13 to September 21, 2014. Research tools were suicidal ideation, self-esteem, somatization, job-seeking anxiety status, problem-focused coping, and family support. Data were analyzed using SPSS 12.0, and included the mean, standard deviation, t-test, one-way ANOVA and Scheffe test. Pearson's correlation coefficient and multiple regression by stepwise selection were also conducted to identify factors influencing suicidal ideation. Results: Suicidal ideation differed significantly according to marital status and spouse income. Suicidal ideation was positively correlated with somatization and job-seeking anxiety status, and negatively correlated with self-esteem and family support. Effective variables were family support (${\beta}=-.03$, p<.001), somatization (${\beta}=.22$, p=.001), spouse income (Yes)(${\beta}=-.18$, p=.003) and self-esteem (${\beta}=-.14$, p=.041). These variables explained 28.2% of the variance in suicidal ideation. Conclusion: Based on the results of this study, it is necessary to develop family support improvement programs to decrease suicidal ideation of the unemployed.