BACKGROUND: Patients with pelvic organ prolapse (POP) usually present with POP, but stress urinary incontinence (SUI) is also found during history taking and physical examination. As a result, the complaint of SUI is persistent despite POP surgery. Therefore, SUI found along with POP and undergoing surgery can be performed Kelly plication method. OBJECTIVES: To examine the effectiveness of Kelly's plication method on clinical changes and quality of life of patients suffering from SUI. METHODS: A single cohort prospective one-group pretest-posttest design conducted at RSUP Dr. Kariadi Teaching Hospital Semarang involving 31 research subjects. All subjects were measured preoperative IIQ-7 questionnaire and pad test. Then, all subjects will undergo Kelly method surgery. Postoperative evaluation will be conducted 3 months later, including measurement of the IIQ-7 questionnaire and pad test. All data will be analyzed with univariate and bivariate analysis using paired t-test and Wilcoxon test. RESULTS: The effectiveness rate of Kelly's plication method was 58.06% in this study. Most of the subjects were aged 50-59 (38.7%) years and had experienced menopause (87.1%). Correlation analysis of baseline data on the degree of preoperative SUI showed that the degree of POP correlated SUI. The Pad test and IIQ-7 questionnaire test showed a significant decrease in postoperative measurements in the treatment group (p: <0.001 & p: <0.001). CONCLUSIONS: Kelly's plication method is effective in treating SUI.