A multi-layer intervertebral spacer (1) includes at least three superimposed layers, i.e. lower (3), top (2) and at least one intermediate (4) layers, wherein the at least one intermediate layer (4) is made of a material which differs from the material of the lower (3) and top (2) layers and is less rigid and the inventive spacer, in a view from below, is generally shaped in the form of a bean and can be placed by means of a posterior or pasterolateral surgery.