An intervertebral implant includes an essentially tubular body which is made from a biocompatible solid material. The body includes a large inner cavity which is defined by upper and lower walls, lateral walls, a front wall, and a rear wall, the rear wall having a tapped axial hole. A replaceable compression plug, which can be adapted by screwing, is inserted into the hole, in order to compress a graft which is disposed in the inner cavity of the implant.