Abstract: A leash-mounted storage device includes front and rear pouches attached together and forming a channel therebetween. The front pouch includes a front opening for receiving a supply of disposable bags for picking up pet droppings. The rear pouch includes a top opening for receiving dirty bags after they are filled with animal waste. First and second hook-and-loop fastening straps are attached to the front pouch adjacent the opposite ends of the channel. The storage device is attached to a pet leash by slipping the leash through the channel, wrapping the first fastening strap through the hand loop of the leash, and wrapping the second fastening strap around an intermediate portion of the leash. Thus the storage device is securely attached to the leash. Instead of holding pet droppings, the storage device may also be used for holding a variety of other pet related items, such as pet toys, pet medication, water container, water dish, etc., or it may be used for holding personal items, such as keys, wallet, etc.