Purpose: To investigate the relationship between exercise habits and health-related quality of life(HRQOL) in “Tokuteikenshin” participants. Methods: One hundred twenty two community-dwelling “Tokuteikenshin” participants were investigated for their exercise environment by questionnaires. HRQOL was determined by SF-36. The subjects were divided into persons at maintenance stage (EA) and at precontemplation, contemplation, preparation, or action stage (NEA) according to their exercise habits by Transtheoretical Model (TTM). Results: In male, Physical Function (PF) score in HRQOL was significantly higher among participants in EA group than in NEA group (p<0.05). In female, PF score, Vitality (VT), and Role Emotional (RE) score in HRQOL were significantly higher in EA group than NEA group (p<0.05). In female, more people in EA group did exercise with their family or friends than those in NEA group. (p<0.05). Discussion and Conclusions: Exercise habit may increase PF, VT and RE in HRQOL. In addition, companions during exercise may encourage their maintenance in exercise habits especially in female.