to bending of the type represented in fig2 i e with respect to bending in the horizontal longitudinal plane of the ski referring now to fig6 and 7 there is shown a second preferred embodiment of the present invention a rigid bar part 7 is arranged in each case behind heel part 2 and in front of front jaw 3 such that it can pivot about a transverse axis of the ski by means of a joint or articulation 8 however rigid bar part 7 cannot pivot with respect to the vertical axis of the ski each end of bar part 7 which is remote from the respective articulation 8 is secured on the ski 1 by means of a guide member 9 such that it can move in the longitudinal direction of the ski but is relatively immovable in the transverse direction of the ski consequently bending of the ends of the ski relative to the central region of the ski in the transverse direction of the ski is impeded it will be appreciated that the embodiment shown in fig6 and 7 allows control of the transverse bending to be effected independently for the toe end and the heel end of the ski fig8 and 9 show a modified version of the embodiment shown in fig6 and 7 heel part 2 and front jaw 3 are connected to one another via a plate 4 in order to further increase the bending rigidity of the ski in the transverse direction of the ski referring now to fig1 there is shown yet another embodiment of the present invention bar parts 7 are configured in a plate like manner and are arranged between heel part.