Background: Despite well documented health benefits of exercising, only one third of older adults participated in regular exercise globally. Studies investigated factors related to maintenance of exercise among older people found that social support, exercise experience, selfefficacy, outcome expectation and awareness of exercise may have played important roles in older people s exercise behaviours. Understanding impact of factors related to maintenance of exercise may contribute to decision making about tailored physical activity intervention that could enhance maintenance of physical activity among older people. Objective: To investigate the impact of exercise maintenance factors among older people living in rural area. Methods: A retrospective study design was used to survey a group of older people who have participated in a walking trial between 2003 and 2004. Data were collected through fact-to-face interviewing with the use of a structured questionnaire. Hypothesis was tested through statistical analysis of logistic regression with the use of SPSS 12.0 software. Results: A total of 108 participants was recruited. There were 76% of participants self-reporting to involve in regular physical activity and 69% of participants meet our requirement of being in a maintenance stage. Three factors were included in a logistic model to explain maintenance of mild physical activity and explained 53% variance of the dependent variable. Exercise self-efficacy was an only predictor of older people s moderate physical activity and explains a total variance of 24%. Conclusions: Design of physical activity intervention aiming at enhancing maintenance of physical activity among older people needs to take factors of exercise self-efficacy, exercise outcome expectation and number of chronic disease into consideration. Improving exercise self-efficacy may be particularly crucial in increasing maintenance of moderate physical activity in older people. Future study investigating factors related to maintenance of physical activity among older people living in urban area is warranted.