Objective: To determine physical activity (PA) self-efficacy correlates in breast cancer survivors. Methods: Mail survey of 192 breast cancer survivors. Results: Structural equation analyses demonstrated significant and direct associations for perceived PA barriers (β=-.29), fatigue (β=-.24), social support (β=.12), enjoyment (β=.12), and prediagnosis PA (β=.11) with barriers self-efficacy. Prediagnosis PA (β=.51), social support (β=.26), and barriers self-efficacy (β=.13) demonstrated direct associations with current leisure PA. Task self-efficacy analysis results were similar except perceived barriers and prediagnosis PA were not associated with task self-efficacy. Conclusions: Multiple potential efficacy correlates exist and may vary based on the aspect of self-efficacy examined.