Technologies are generally provided for a trans-vaginal sling delivery device for deploying a sub-urethral sling to treat urinary incontinence. A delivery tool coupled with an interior of a delivery tube may be advanced through the vagina, and a pointed end of the delivery tube may puncture the vaginal wall. A sub-urethral sling may be attached to the delivery tube, and the sling may be longitudinally wrapped into a reduced delivery profile around the delivery tool within the delivery tube. The delivery tube may include a longitudinal slit opening, and the sling may be deployed from the delivery tool by rotating the delivery tool. Two delivery tubes and delivery tools may be employed to deploy each end of the sling, such that each end of the sling may be anchored on a right and left side of the urethra with a portion of the sling supporting the urethra from beneath.
