Purpose: The present study aimed to clarify the status of exercise and related factors among survivors of breast cancer. Methods: Questionnaires were distributed to survivors of breast cancer. The question items addressed the status of exercise participation, knowledge about the effects of exercise and need for support. Factors associated with exercise participation were analyzed using logistic regression analysis. Results: Among 293 valid responses (rate, 84.2%). Fifty-eight point four percent participated in exercise and 41.3% decreased exercise participation after being diagnosed with breast cancer. Furthermore, 91.9% needed support from health care providers regarding exercise. About 70% of respondents were aware that exercise improves sleep, but <50% knew that exercise ameliorates symptoms associated with breast cancer. Among seven factors, age, employment status and chemotherapy were associated with exercise status. Conclusion: Breast cancer survivors who are younger, employed and undergoing chemotherapy might not participate in exercise. The preventive effects of exercise on breast cancer and the importance of continuing daily exercise should be promoted. Health care providers should provide support for patients to participate in exercise considering the influence of treatment and physical capabilities.