The purpose of this research is to analyze the depression, happiness on aging, self-esteem, life satisfaction and disability of daily living activity level of the elderly people, and to analyze the variables to impact on their depression. The study data were analyzed descriptive analysis, t-test, ANOVA, Pearson's Correlation Coefficient, and multiple regression analysis. The most influential variables on the elderly depression were self-esteem with 27.9% of explanatory power (β=-.318, p<.001), followed by life satisfaction with 5.5%(β=-.248, p<.001), happiness on aging 4.1%((β=-.200, p<.001), disability of daily living activity 1.6%(β=.128, p=.026), and 4 variables explaining 39.1% of the elderly depression. Therefore it is necessary to develop specific education programs to reduce depression and to improve self-esteem and happiness on aging of the elderly.