In this study, both the formation of the cisterna chyli and courses ot the thoracic duct were mac-roscopically investigated in New Zealand rabbits. In this purpose, eight ot adull New Zealand rabbits were used. Animals were anaesthetized by the combinating ot Rompun and Ketalar. Then, abdominal cavity was opened with a incision. Indian ink were injected inlo the lateral iliac lymphonode, medial iliac lymphonode, hepatic tymphonode. gastric lymphonode. cranial mesenteric lymphonode and caudal mesenteric lymphonode. After that, the courses and formations of the thoracic duct and cisterna chyti were studied by dissecting ol the animals. Cisterna chyli is an elliptical sac like structure which lies at the level ot the second and third lumbar vertebrae. In only one material, it was determined that the cisterna chyli extends from the second lumbar to fourth lumbar vertebrae. It was observed that the cisterna chyli received caudally two branches named lumbar trunk and venlrally visceral trunk.The thoracic due! arises from the cistema chyli at the level of the ongin of cranial mesenteric artery. Then it passed through the aortic hiatus of the diaphragm concominantly with aorta within the thoracic cavity, it situated to right and dorsal to the thoracic aorta from the diaphragm to seventh thoracic vertebrae. It was seen that the thoracic duct extends to the basis cordis and passes to the left side of the midline. In only one matenal, after passing to the diaphragm, it was observed that the thoracic duct divides into two branches. The precardial segment ot the thoracic duct coursed to craniaJ at the left long colli muscle and dilates into an ampulla. It was delermined that the thoracic duct ends in the lett vena cava in six animals But in two ammats, it terminates into the left external jugular vein, alter leaving the cranial thoracic aperture.