A device is described, for fastening a cranial limb to the cranial crown adapted to be positioned both into a craniotomial hole and into a craniotomial cutting, comprising: a cortical supporting riser; first closing means operatively connected to the riser; second closing means to be fastened to the riser to complete its closing; a handle connected to the cortical riser; and a base for a better cooperation with the elastic arms; the first closing means are composed of at least two elastic arms operatively connected to the cortical riser and that end each one in at least one small transverse arm.