Objectives: To investigate the urodynamic features in women with anterior vaginal wall prolapse and to compare with prolapse degrees and obtained urodynamic signs in this grup. Design: Prospective study Setting: Ministry of Health Bakirkoy Dr. Sadi Konuk Training and Research Hospital Training and Research Hospital Subjects: A total of 395 neurologically intact women with anterior vaginal wall prolapse were evaluated. Cystosel stage was graded according to pelvic organ prolapse quantification (POP-Q). They were divided into three groups: Stage I (n = 165), II (n = 150) and III (n = 80). Intervention: Full multichannel urodynamic test Main outcome measure: Urodynamic parameters Results: Incontinance was established 76% in stage I, 72% in stage II, and 67% in stage III patients. Residuel urine volume was too much in stage III compared to stage I and II, respectively (p = 0.001, p = 0.029). The urodynamic paramethers (the first sensation to fill, the first desire and the strong desire to void) were less in stage I than stage II and III, respectively (p = 0.011, p = 0.039 and p = 0.008). The maximum bladder capacity (up to 300 ml.) was much more in stage III than stage 1 and 2 (p = 0.047). Conclusions: Our study showed that the anterior vaginal wall prolapse can be together with incontinance even if it is at the begining stage. Also, the sensation of the bladder reduces with the increase in the stages of the anterior vaginal wall prolapse and it can mask the incontinance signs. The women with large anterior wall prolapse may have a weak detrusor contraction and a high postresidual urine volume.