Purpose: This study was done to evaluate the relationship of stress, coping skill, suicide risk, and suicidal ideation according to treatment phases in patients hospitalized with schizophrenia. Methods: Participants, 111 patients hospi-talized with schizophrenia, were selected from three psychiatric hospitals in G province. Data were collected from March 5 to April 15, 2016 and analyzed using t-test, x² test, Fisher`s exact test, Pearson correlation coefficient, one-way ANOVA, and Scheffe`s test analysis with the SPSS/WIN 18.0 program. Results: Based on NOSIE-30, the treatment phases were divided into Beginning, Intermediate, and Completion stages. Patients in the Intermediate stage showed a higher stress level (F=5.13, p=.007) and active coping skills (F=6.70, p=.002) than patients in other stages. They also showed the highest suicide risk (F=7.42, p=.001), and the patients in the beginning stage had the highest suicidal ideation (F=20.20, p<.001. There were significant relationships between study variables at each stage. Conclusion: The findings from this study show differences in levels of stress, coping skill, suicide risk, and suicidal ideation according to treatment phases and indicate the need to develop suitable nursing intervention pro-grams according to patients` treatment phases.