An easy-to-manufacture, easy-to-use disposable pet diaper having a lightweight upper portion and an absorbent bottom portion, comprising elongated strips from the upper portion and corresponding slits in the lower portion whereby the diaper may be tied across the back of the pet when used. The diaper is of layered construction, having a superabsorbent portion. The layered construction allows the pet diaper to be constructed in one piece. The diaper also has intersecting slits for holding a pet's tail in place.