The invention relates to a hollow blade body for a hollow blade (1), comprising a blade wall (6) which has a pressure side (4) which has at least one first blade connection element on the inner side (9) thereof, and a suction side (5) which has at least one second blade connection element diametrically opposite to the first blade connection element on the inner side (9) thereof, wherein the first blade connection element can be engaged with at least one first rib connection element which is arranged on a first longitudinal end of an insertion rib (12 to 18), and the second blade connection element can be engaged with at least one second rib connection element which is arranged on a second longitudinal end of the insertion rib (12 to 18) facing away from the first longitudinal end in such a way that the insertion rib (12 to 18) is fixed on the hollow blade body and effects a stiffening of the hollow blade (1).