The study was designed to validate a model for a successful aging process and examine the gender differences in the aging process. Three hundred twelve participants who were 65 or older completed a Taiwan Social Change Survey that measures four factors that define successful aging process: including physical, psychological, social support, and leisure activity. Structural equation modeling analysis shows in addition to the three supporting variables, leisure activities is a significant factor related to successful aging process. The findings of the study verified that the proposed model is well supported by the data and fits well for both female and male populations. The findings of the study also suggest that, for gerontological researchers, leisure activities of old people deserve their attention when helping the old generation age well. (Contains 3 tables and 1 figure.)