Abstract: This disclosure relates to devices for automatically filling sand bags with pre-measured quantities of sand. It is simple, reliable, and easily operated by unskilled workers. It is comprised generally of a chute having multiple sides and sized to hold a pre-measured quantity of sand and configured to allow the sand to flow reliably when the operator so desires, a door, and an overcenter device for opening and closing the door to allow the pre-measured quantity of sand in the chute to flow into a standard size sandbag located below the chute.