Abstract: Rodent controlling device wherein rodents, such as rats, are directed to a zone where a poisoning agent has been placed. The device embodying the invention is made from a single stamping of suitably stiff but bendable material, such as sheet metal, sheet plastic or paperboard, same is bent to form a tube, preferably one of rectangular cross section and held by suitable tabs inserted in corresponding slots. Rodent poison is placed within said tube. Further tabs form a low wall across each end of the tube which both rigidify the tube and assist in holding the poison within the tube. Holes are placed if desired through an upper portion of the tube to facilitate inserting the poison therein. The tubes are placed in a known runway of rodents in question and same are poisoned as they pass through the tubes in endeavoring to follow their habitual runways.