Background In modern times in Korea, depression among adolescents is very serious, and the number of adolescents who experienced depression was 20.3% in the first year of middle school to 29.0% in the third year of high school. Therefore, interest in identifying the causes of depression and reducing it is important, and academic interest in preventing suicide due to depression is also very important. Objectives This study aimed to present a model that can reduce the effect of depression on suicidal ideation through gratitude and growth mindset by examining the moderated mediating effect of the growth mindset.