An animal restraining harness includes first and second straps connected at opposed ends to connectors. A center chest strap extends between the first and second straps. A flexible restraining strap is looped between the connectors and is attachable to a leash. The restraining strap enables the first and second connectors to be pulled together reducing the diameter of the second strap as a result of a pulling movement of an animal wearing the harness which applies pressure on the rib cage of the animal.