Background: Most of the stress urinary incontinence (SUI) occurs after first delivery and related to the mode of delivery. Objective: To determine the factors that affects the incidence of stress urinary incontinence post partum Methods: Women experienced with stress urinary incontinence 3 months after birth vaginally or section caesarean were enrolled in the present cross sectional study. The strength of the pelvic floor muscle measured with perineometer. All of women were assessed for SUI using Sandvix Severity Index (SSI) dan The three incontinence question (3IQ) questionnaire. A person chi-square test was used to analysis with p value