The purpose of this research Is to clarify the relationship between leisure activity participation, job stress, social support and subjective well-being among security agents. 356 (92%) questionnaires were obtained from 12 private security companiesin metropolitan Seoul. The conclusion follows. First, the frequency of participation in activities on the subjective well-being reflects the direct influence. and period by participating in the job stress on the subjective well-being reported more negative affect, in other words, Job Stress is reduced, social support and subjective well-being is increased. Second, job stress has a negative effect as a parameter to subjective well-being and participation in the period, in other words, subjective well-being is decreased by the more get job stress. Third, social support affects the subjective well-being, leisure activity participation and social support that have no relationship, In other words, subjective well-being is increased by the more get social support. Fourth, frequency and duration of participation in leisure activity directly and indirectly affects to subjective well-being. increasing the frequency of participation activities make that subjective Well-being is increased, increasing the participation period makes that job stress is reduced, job stress reduction make that subjective well-being is increased, and increasing the social support makes that subjective well-being is increased.