Abstract: Known two-step flexible shaft couplings comprise coupling parts of relatively complex configuration. According to the invention, the coupling elements (7, 7a, 7b) are positively held at least in one circumferential direction, each coupling element comprises an axially open receiving opening that is axially engaged without play by a corresponding jaw of the other coupling part, and the elastic coupling elements comprise at least one cavity for the corresponding jaw, at least on one side of the respective receiving opening—viewed in circumferential direction—, the wall sections of each coupling element adjoining the cavity being elastically deformable.