In women, stress urinary incontinence is the most common subtype of urinary incontinence. Trans-obturator slings can be used for minimally invasive treatment of stress urinary incontinence. The aim of this procedure is to place the mesh through the obturator foramen and underneath the mid part of the urethra with minimal damage to surrounding tissues. There are remarkable variations in the bony architecture of the female pelvis, and this variability may have an important effect on sling operations. Understanding the surgical anatomy of the obturator foramen, pelvic floor and perineum is necessary to make a successful implantation of transobturator tape and minimize morbidity. Cadaveric dissections are helpful to demonstrate anatomic landmarks.