The interchangeable pet harness apparel wherein the pet owner can mix and match to change the look and style of the pet harness apparel without removing the pet harness or the entire pet apparel. The interchangeable pet harness apparel comprises a pet harness, a plurality of interchangeable bottom parts of the pet apparel, and a plurality of interchangeable top parts of the pet apparel. Each bottom or top part comprises a part connector for removably connecting the respective bottom or top part to the pet harness such that the part connector of the respective bottom or top part mates with the part connector of the pet harness to attach the respective bottom or top part to the pet harness to form a pet harness outfit.
