Abstract: “The purpose of this study is to examine the effects of symptoms level of dementia elderly on the primary caregiver’s depression. In addition, moderating effect of social support was examined. Methods Based on the results, the necessity for intervention in the level of social welfare as a way to mitigate primary caregiver’s depression was suggested. In order to accomplish these purposes, a total of 197 who are spouse and adult children as primary caregivers of dementia elderly using day care facilities or services in South Korea. Date were analyzed by frequency analysis and descriptive statistics, regression model analysis with SPSS 18.0. Results In case of analysis results, the mean value was reported 0.9 out of four point about primary caregiver’s depression and the mean value of social support was reported 3.34 out of five point. And besides, the analysis result of dementia elderly’s symptoms showed that prevalence of depression/dysphoria were 62.2%, prevalence of aberrant motor were”

Keywords: Dementia Elderly, Primary caregiver,Depression,Dementia Symptoms.