A gearbox supporting device of a wind turbine with a rotor, a substantially horizontally oriented rotor shaft, a gearbox and a main frame. The gearbox supporting device includes at least one rolling bearing arranged between a rotor hub and the gearbox and at least two supports on the gearbox. The supports each have at least one central supporting body, at least one frame and a plurality of flat elastomer bodies that are or can be clamped between the frame and the supporting body. At least two of the supports are fixed bearings for absorbing at least 50% of the rotor thrust acting in the axial direction of the rotor shaft during the operation of the wind turbine.