An intervertebral insertion system in an intervertebral space between two adjacent vertebrae, said system comprising an intervertebral cage (1) and a fixation device for fixing said cage to one of said vertebrae, characterized in that - said cage has the shape of a closed ring , in which a narrowed descending part has a height, along the geometric axis of the spine, inferior to the rest of this cage and forms a flat bar (62) and two lugs (54) arranged symmetrically are formed in the cage, - the fixing device, configured to be inserted between said flat bar (62) and said lugs (54), is formed by two V-shaped anchor tabs (51, 52) connected by a rod (53) flat, - in which the flat rod (53) is adapted to rest on the flat bar (62) when the tabs (51, 52) are inserted between the flat bar (62) and the lugs (54) and impacted inside of a plate of a vertebra, in which the thickness of the flat rod (53) and the flat bar (62) is determined so that its overlap after impact is not greater, along the geometric axis of the column vertebral, that the rest of the cage (1) intervertebral.Un sistema intervertebral de inserción en un espacio intervertebral entre dos vértebras adyacentes, comprendiendo dicho sistema una jaula (1) intervertebral y un dispositivo de fijación para fijar dicha jaula a una de dichas vértebras, caracterizado porque - dicha jaula tiene la forma de un anillo cerrado, en el que una parte descendente estrechada presenta una altura, a lo largo del eje geométrico de la columna vertebral, inferior al resto de esta jaula y forma una barra (62) plana y dos orejetas (54) dispuestas de forma simétrica están formadas en la jaula, - el dispositivo de fijación, configurado para ser introducido entre dicha barra (62) plana y dichas orejetas (54), está formado por dos lengüetas (51, 52) de anclaje con forma de V conectadas por un vástago (53) plano, - en el que el vástago (53) plano está adaptado para apoyarse sobre la barra (62) plana cuando las lengüetas (51, 52) son introduc
