This study was designed to ivestigate the burden and mental health of family Caregiver with Chronic mentally ill patients in Community. The subject were ill family caregiver with Chronic mentally ill patients, living in Daejon, Cheungzu, Chungnam, Chungbook, from October 1999 to February, 2000. The lsnstrument for this study were the burden scale developed by Yang li-kyung(1995) and SCL-90R by Kim and Won(1978). The data was analysed by descriptive statistics, t-test. Person correlation coefficient and ANOVA. The results of analysis were as follows : 1. The mean score of family caregiver burden was 156.13. The mean score of the dimension for family burden raged down in following order : Social politics (3.96), family problem (3.80), social activity of mentally ill patients(3.77). Violence behavior and risk for disorder(3.70). Social prejudice(3.68). 2. The relative factors influencing family burden were perspective patient`s future (F=4.32, p=0.001), marriage status (F=2.61, p=0.01), relationship with patients (F=2.51, P=0.02), relationship with residence (F=2.51, p=0.01). 3. The mean score of mental health for family caressive was 166.20. The mean score of the dimension for mental health ranged down in the following order : Depression(2.90), Obsessive compulsive(2.08), interpersonal sensitivity(1.96), socialization(1.89), anxiety (1.88). 4. The relative factors influencing mental health for family caressive were : sex (t=4.91, p=0.02), age(F=4.73, p-0.001), Education (F=3.72, p=0.01) relationship with patents (F=3.15, p=0.01). 5. The relationship between the degree of family caregiver burden and mental health was statistically correlated(r=0.26, p=0.01). As a result, this study suggests that nursing intervention program is needed to develop the effectiveness of various program intended not only to reduce family caregiver burden among chronic mentally Ⅲ patients in community, but also to improve mental health. Further study is needed to examine the affecting factor of family caregiver burden and mental health among chronic mentally Ⅲ patients in community.