There is a possibility that exercise is related to social participation in elderly. Social participation has positive effects for health in elderly. The aim of this study was to examine the differences in social interaction among type of habitual exercise in elderly. Design of this study was cross-sectional study. The subjects of this study were 255 elderly people aged over 65 years old who participated in health promotion programs (58men and 197women). Social interaction was evaluated using the "Index of Social Interaction". "Index of Social Interaction" have five subscales (independence，social curiosity，interaction，participation and feelings of safety). Type of habitual exercise was evaluated by with or without a habit of exercise and content of exercise. Analytical method，we divided subjects to 2 groups (exercise group and without exercise group) or 3 groups (sports group, exercise other than sports group and without exercise group) and compare social interaction. Results，exercise group was high independence，social curiosity and participant in the society than without exercise group. Especially，independence was only sports group was higher than without exercise group.
