Thoracoxypophagia consists of the union of two fetuses by the chest and xiphoid region, it is a rare congenital alteration. This study aimed to report a case of thoracoxypophagia in sheep. A sheep with dystocic delivery was attended, who had the first fetus of normal birth, but lifeless, requiring a cesarean section for the second birth. After the surgery, a congenital malformation of the thoracoxypophagia type was found between two fetuses, who were stillborn. Similar reports have not been found in the literature, as it is a rare condition, which may be related to several factors, such as viruses, drugs, teratogenic plants and inbreeding, leading to gestation to a dysthocic delivery and incompatibility with life.