A movable vehicle roof has a plurality of segments which are movable relative to one another, in particular are displaceable and/or pivotable, and of which at least one has a core containing a filling structure forming cavities. The filling structure core is provided with a retaining part which engages around it in some regions at least on one side and, together with lateral elements disposed on it as a single piece, forms at least one intersecting point with the top framework.