An artificial insemination device for breeding animals, such as sows, including a catheter suitable for being introduced into the genital system so as to enable sperm to be discharged therefrom and a reservoir of sperm connected to the catheter. The catheter has a conduit with an end piece at a distal end thereof. The conduit is suitable for lodging in the neck of the animal's uterus. A ring is provided so as to form a tight seal between the reservoir and the catheter.