During the last decade, pelvic floor muscle exercise (PFME) therapy has proved its short-term efficacy among women with urinary incontinence. Long-term success with PFME therapy is hampered by non-adherence. So far, specific knowledge on determinants of adherence behavior has been scarce. A cross-sectional study was conducted to elucidate the relative importance of determinants of the intention to adhere to PFME therapy in women with urinary incontinence. Based on behavioral theories, literature research and interviews, a questionnaire measuring determinants of the intention to adhere to PFME therapy was developed. In total, 129 women, aged 17 years or over, with symptoms of urinary incontinence, completed this questionnaire. Multiple regression analysis with backward elimination was carried out to identify determinants that predict intention. Significant predictors of the intention to adhere to PFME therapy were the amount to urinary loss per wet episode and women's perception of their ability to do the exercises as recommended under various circumstances. Building self-efficacy might be a good starting point for health education interventions aiming to promote adherence to PFME therapy, which can be used by physiotherapists and general practitioners.