A wave power plant (1) comprising: a frame construction (2, 2′), a plurality of rocking rotors (2) arranged on the frame construction (2, 2′) on at least on rotor axis (4), a drive axis (30) connected to a generator and journaled in said frame construction (2, 2′); and at least one belt drive connection (40) arranged between the rotor axis (4) and the drive axis (30) for each rocking rotor (3).