A pet strap includes a pulling unit, a locking unit, and an elastic drawing mounted between the pulling unit and the locking unit and including an elastic inner tube and a weaving outer layer mounted on a surface of the inner tube. Thus, the elastic drawing unit provides a buffering effect to the user to reduce the reaction applied by the pet on the user's hand, thereby preventing the user's wrist from being hurt when the pet is running violently. In addition, the weaving outer layer is enclosed around the inner tube, so that when the inner tube is broken due to an excessive reaction, the inner tube will not being sprung outward, thereby preventing the user from being hurt by the broken inner tube.