Abstract: A new sand bag filling device for taking bulk sand and filling sand bags with the bulk sand on demand. The inventive device includes a hopper having interior space, a top, a bottom, a pair of end walls, and a pair side walls extending between the end walls. The top of the hopper has an opening into the interior space of the hopper while the bottom of the hopper has ground engaging members. A conduit outwardly extends from one of the end walls of the hopper away from the hopper. The conduit has a first opening into the interior space of the hopper and an exterior second opening outside the hopper. An auger member is rotatably mounted in the interior space of the hopper. The auger member extends from the interior space of the hopper into the conduit through the first opening of the conduit so that its screw portion is extended into the conduit. A motor is proved for rotating the auger member in a direction.