Intervertebral implant (100) for fusion between two vertebral bodies of a spine comprising: - a fusion box (1), which extends from a posterior side to an anterior side, adapted to interpose between two adjacent vertebral bodies of a patient； - a fixing plate (2, 2a, 2b, 2c) having at least one passage (16)； said fusion box (1) and fixing plate (2) comprising cooperating elements (8, 10, 7, 19, 20, 21) for fixing said fixing plate (2, 2a, 2b, 2c) on the front side of the melting box (1)； said elements (8, 10, 7, 19, 20, 21) comprising cooperating means (8, 7) for retention and pivoting means (10, 19), said pivoting means (10, 19) being arranged to guide a rotation , around a pivot axis (x) of said fixing plate (2, 2a, 2b, 2c) with respect to said fusion box (1), wherein the fixing plate (2, 2a, 2b, 2c) it can be freely moved in a posterior-anterior direction with respect to the fusion box (1), to a second configuration in which the displacement of the fixing plate (2, 2a, 2b, 2c) in a posterior-anterior direction with respect to the melting box (1) is restricted by the retaining means (8, 7), characterized in that the retaining means (8, 7) comprise at least a portion (7) projecting radially, with respect to said pivot axis (x), and at least a recessed portion (8) intended to accommodate said protruding portion (7) in the second configuration of the impl suede (100).Implante (100) intervertebral para la fusión entre dos cuerpos vertebrales de una columna vertebral que comprende: - una caja (1) de fusión, que se extiende desde un lado posterior a un lado anterior, adaptado para interponerse entre dos cuerpos vertebrales adyacentes de un paciente； - una placa (2, 2a, 2b, 2c) de fijación que tiene al menos un pasaje (16)； comprendiendo dicha caja (1) de fusión y placa (2) de fijación elementos (8, 10, 7, 19, 20, 21) cooperantes para fijar dicha placa (2, 2a, 2b, 2c) de fijación en el lado anterior de la caja (1) de fusión； comprendiendo dichos elementos (8, 10, 7, 19, 2
