The aim of the study was to describe the morphology of the Transverse atlantal ligament in dogs with a focus on the features that have not been described yet. The research examined cadavers of 20 adult male and female dogs of different breeds, three morphotypes, fixed in 10% formaldehyde. The Transverse atlantal ligament was shown by removing the Dorsal arch of the Atlas. The length (DWP), width (SWP) and thickness (GWP) of the ligament were measured. The linear correlation function with the body mass (mc) and the cranial index and the coefficient of determination R² were determined. Histological specimens from 10 Transverse atlantal ligaments were marked. The results of the research indicated that the length, width and thickness of the described ligament is positively correlated with the body mass in a dog. The histologic studies showed that the Transverse atlantal ligament is fibrocartilagenous on the whole. This fact should be taken into consideration in all affections connected with the cartilage destruction. The role of the fibrocartilage and their types in the ligament have also been discussed.