Abstract: Device for a wave-powered generator where a generator via a drive and a primary drive line is connected to a float arranged floating on a water surface, and the drive comprises: a first and a second drive shaft each provided with a freewheel and a drive roller; a part of the primary drive line in engagement with each of the drive rollers; the inlet direction of the primary drive line on the first drive roller being opposite to the inlet direction on the second drive roller such that a linear movement of the drive line rotates the first drive roller opposite to the second drive roller; and the freewheels are interconnected by means of a transmission means effecting the freewheels outgoing rotational motions being identical; and one of the freewheels via further transmission means is arranged to be able to rotate the generator's drive shaft.