Fibromyalgia (FM) is a debilitating syndrome for which medication has limited effects for relief of symptoms. While physical activity has been shown to be a successful intervention to alleviate FM symptoms, older adults with FM are less fit and tend to be more sedentary than the general population. One of the most common barriers to physical activity among older adults with FM is low physical activity self-efficacy. The purpose of this study was to determine the association between self-efficacy for physical activity and physical activity level in community-residing older adults with FM. Participants for this study were part of a larger research project that measured the influence of physical activity level on cognitive and physical function of people, all of whom were aged 50+, some with and some without FM. This study consisted of 70 participants, all of whom were older adults with a diagnosis of FM. A significant correlation was found between self-efficacy and physical activity levels, supporting the first hypothesis. However, the second hypothesis was not supported. When controlling for other variables, self-efficacy was not significant. Length of time diagnosed with FM, fatigue, BMI and depression were found to be significantly correlated with physical activity levels. Multiple regression analysis revealed that BMI and depression were the most significant barriers to physical activity.