Load changeover switch for a tap changer, wherein - for each phase to be switched two fixed permanent main contact pairs (3, 4) are provided which can be bridged over by a single movable electrically-conductive permanent main contact pivotable into two different end positions, - in each phase to be switched a respective one of the permanent main contact pairs (3, 4), when in the stationary state, is bridged over and conducts the permanent current, in such a manner that at the start of a load changeover the permanent main contact pair (3, 4) previously conducting the permanent current opens and at the end of each load changeover the previously open other permanent main contact pair (4, 3) is bridged over and takes over the permanent current, - in the interior of the load changeover switch, a centrally extending switching shaft is arranged by which the movable permanent main contact is actuable, - each of the two permanent main contact pairs (3, 4) respectively consists of a first permanent main contact (8, 12) and a second permanent main contact (9, 13) electrically insulated therefrom, - in each instance one of the first permanent main contacts (8, 12) is connected with side A and the other one of the first permanent main contacts (8, 12) is connected with the second side B of the load changeover switch, - the two second permanent main contacts (9, 13) are electrically connected with a common load shunt of the load changeover switch, characterised in that - the movable permanent main contact is of rail-shaped construcion in such a manner that this is electrically connected only in the respective end positions thereof with the permanent main contacts (9, 13) of the load shunt, - a drive disc consisting of two individual discs (23.1, 23.2) is provided, which has roller engagements (22.1, 22.2), which are offset relative to one another through 120° and which can be, depending on the switching direction, so brought into engagement with actuating rollers (25.1, 25.2) arranged at a rocker of the movable permanent main contact that the movable rail-shaped permanent main contact is actuable by way of only a single deflection. - for each phase to be switched two fixed permanent main contact pairs (3, 4) are provided which can be bridged over by a single movable electrically-conductive permanent main contact pivotable into two different end positions, - in each phase to be switched a respective one of the permanent main contact pairs (3, 4), when in the stationary state, is bridged over and conducts the permanent current, in such a manner that at the start of a load changeover the permanent main contact pair (3, 4) previously conducting the permanent current opens and at the end of each load changeover the previously open other permanent main contact pair (4, 3) is bridged over and takes over the permanent current, - in the interior of the load changeover switch, a centrally extending switching shaft is arranged by which the movable permanent main contact is actuable, - each of the two permanent main contact pairs (3, 4) respectively consists of a first permanent main contact (8, 12) and a second permanent main contact (9, 13) electrically insulated therefrom, - in each instance one of the first permanent main contacts (8, 12) is connected with side A and the other one of the first permanent main contacts (8, 12) is connected with the second side B of the load changeover switch, - the two second permanent main contacts (9, 13) are electrically connected with a common load shunt of the load changeover switch, - the movable permanent main contact is of rail-shaped construcion in such a manner that this is electrically connected only in the respective end positions thereof with the permanent main contacts (9, 13) of the load shunt, - a drive disc consisting of two individual discs (23.1, 23.2) is provided, which has roller engagements (22.1, 22.2), which are offset relative to one another through 120° and which can be, depending on the switching direction, so brought into engagement with actuating rollers (25.1, 25.2) arranged at a rocker of the movable permanent main contact that the movable rail-shaped permanent main contact is actuable by way of only a single deflection.