Purpose: 　The study was performed to identify factors influencing suicidal ideation in patients with chronic mental health problems and who live in the community. Methods: Data were collected using questionnaires and participants were 140 people with mental illness living in Y-si, Gyeonggi-do. The study was carried out from May 15 to September 30, 2014. Data were analyzed using descriptive statistics, Pearson Correlation Coefficients, and Logistic Regression with the SPSS/WIN 18.0 statistical program. Results: The number of persons who attempted suicide was 47(33.6%) and the number who had suicide ideation was 22(15.7%). The mean score for depression was 6.4 ± 6.45. The mean score for life satisfaction was 16.5 ± 8.21. Depression had a significant negative correlation with life satisfaction. Odds ratio of suicide ideation was 1.19. The significant factor influencing suicidal ideation was depression. Conclusion: The results of this study can be used in the development and practice of programs to decrease suicide in people with mental illness.