Abstract: A pet waste bag kit includes a dispenser receiving a pet waste bag roll, and a roll-back arrangement. The pet waste bag roll includes a plurality of continuous disposable bags stacked in a roll form, wherein a distal of a preceding disposable bag is linked to a proximal of a following disposable bag. When the preceding disposable bag is dispensed out of the dispenser through the slit opening, the proximal of the following disposable bag is pulled out of the dispenser through the slit opening. The roll-back arrangement is extended from a center of the pet waste bag roll for rolling back the continuous disposable bags in the dispenser to draw back the proximal of the following disposable bag toward the slit opening. The exposed portion of the proximal of the following disposable bag is minimized after the dispensing of the preceding disposable bag.