A device for placing a reinforcing tape in a tissue of the human body includes an introducer having an elongated flexible body, at each of both ends of the body, pulling means, between both ends, a cavity for receiving the tape, and, at the cavity, means for cutting the body into two portions separable by pulling exerted on the pulling means. The cutting means includes at least one aperture provided in the wall of the cavity and intended for the passage of a cutting tool. This device is applicable to the treatment of cystoceles.