An animal harness, comprising a breast strap (1), a belly strap (2), and a back strap (6). The breast strap (1) is provided with a contractible member comprising a buckle (3), a contractible band (2), and a pulling ring (4). The buckle (3) is fixed to a middle position of the breast strap (1). The contractible band (2) passes through the buckle (3), and two ends thereof are respectively connected to two sides of the breast strap (1). The contractible band (2) is connected to the breast strap (1) at a first connection location (11) and a second connection location (12). The length of the contractible band (2) is greater than the length between the first connection location (11) and the second connection location (12). The pulling ring (4) is connected to a middle position of the contractible band (2). When the pulling ring (4) is pulled, the contractible band (2) is tightened, and then the first connection location (11) and the second connection location (12) of the breast strap (1) are pulled, such that the breast strap (1) is subsequently tightened, thereby effectively preventing excessive stress on an animal when the animal suddenly starts to run, and avoiding a situation in which the walker is dragged behind the animal.La présente invention concerne un harnais d'animal, qui comprend une sangle de poitrine (1), une sangle ventrale (2) et une sangle arrière (6). La sangle de poitrine (1) est pourvue d'un élément rétractable qui comprend une boucle (3), une bande rétractable (2) et une bague de tirage (4). La boucle (3) est fixée à une position médiane de la sangle de poitrine (1). La bande contractile (2) passe à travers la boucle (3), et deux extrémités de celle-ci sont respectivement raccordées à deux côtés de la sangle de poitrine (1). La bande contractile (2) est raccordée à la sangle de poitrine (1) à un premier emplacement de raccordement (11) et un second emplacement de raccordement (12). La longueur de la bande contractile (2) est supérieure à la longueur e
