To provide a leash connection structure for a pet harness with which the action of rotation moment to pull down a pet laterally is reduced even if a leash is pulled in the transverse direction or the action of force to rotate the pet harness is reduced and which is friendly to a pet.

The pet harness such as a body belt 1 to be mounted on at least either around the body or around the neck of a pet is equipped with a circular-arc guide bar part 12 extended along around the upper part of the body part or the neck part of a pet or their border part. The guide bar part 12 is movably equipped with a pulling ring 14 for connecting a loop clutch 16 at the tip of the leash 15.