Background:The emergence of the COVID-19 pandemic has caused various changes in all aspects of life in various age groups, especially in the elderly group. In addition, the elderly are included in the group at risk of being affected by COVID-19 because when someone got into old age, various changes in conditions can be occur. As a solution to this problem, the role of the family is needed in providing care for the elderly, both care for physical activity and mental health. This aims to keep the elderly both physically and mentally healthy during the pandemic. Objectives: The sample used in this study is the elderly's family who are members of BKKBN Surabaya City. This study aims to determine the relationship between the role of family on the physical activity and mental health of elderly in the COVID-19 pandemic era. Methods: This research uses a cross sectional approach. The sampling technique is cluster random sampling. The total sample in this study is 113 respondents who were determined based on inclusion and exclusion criteria. The dependent variable in this study is the role of the family, while the independent variables are the physical activity and the mental health of the elderly during COVID-19 pandemic. Analysis of the results of this study using the Chi Square test. Results: The results obtained there is no relationship between the role of the family to the physical activity of elderly (P value = 0.176) and there is a relationship between the mental health of the elderly (P value = 0.001). Conclusion: The role of the family of Bina Keluarga Lansia (BKL) Surabaya to the elderly was in the good category. Most of the elderly had light levels of physical activity and had good mental health state during COVDI-19 pandemic era.