Postmenopausal health problems cause many symptoms that affect the quality of life among women, including the reduction of pelvic floor muscle strength (PFMS). Stress urinary incontinence (SUI) is one of the postmenopausal women’s problems due to various etiology. Risk factors analysis and stratification are important for further prevention and treatment. A case-control study that collects postmenopausal women divided into two groups, 52 postmenopausal subjects with SUI and 52 without SUI. Pelvic floor muscle strength is measured by a perineometer (Pertiron 9300 V). There is a correlation between the occurrence of SUI with parity (OR=11.111 95% CI 2.403-51.371) and the delivery mode (OR=8.704 95% CI 2.984-25.387). The cut-off value of PFMS to predict SUI is 27.03 cmH2O with 84.6% of sensitivity and 84.6% specificity. Our study reveals PFMS in combination with parity and delivery was simultaneously significant to the occurrence of SUI. Pelvic Floor Muscle Strength among menopausal women is correlated with SUI. Risk factors of SUI related to the reduction of PFMS are multiparity and vaginal delivery.