A horizontal-axis wind turbine comprising: a rotor having a hub and blades rotatable by wind and being connected to a main shaft; a rotatable nacelle assembly for supporting the main shaft; a tower for rotatably supporting the nacelle assembly; a dynamo beside the tower; a rotatable vertical shaft extending inside the tower orthogonally disposed to the main shaft for transferring a rotating force of the main shaft to the dynamo, wherein a repulsive torque acts from the vertical shaft against the nacelle assembly due to the load of the dynamo; and characterised by a repulsive torque-balancing mechanism comprising: an upper hollow section attached to the bottom of the nacelle assembly; a casing supporting a horizontal rotary shaft engaged with the vertical shaft, the casing being disposed under the vertical shaft and rotatable around the vertical shaft, wherein a balance torque acts between the casing and the vertical shaft due to the load of the dynamo; a transferring unit coupling the nacelle assembly via the upper hollow section with the casing in such a way and in such a direction, that the balance torque between casing and the vertical shaft and the repulsive torque between vertical shaft and nacelle assembly are balanced; a lower support for rotatably supporting the casing and for supporting a rotating shaft of the dynamo being not rotatable around the vertical shaft. a rotor having a hub and blades rotatable by wind and being connected to a main shaft; a rotatable nacelle assembly for supporting the main shaft; a tower for rotatably supporting the nacelle assembly; a dynamo beside the tower; a rotatable vertical shaft extending inside the tower orthogonally disposed to the main shaft for transferring a rotating force of the main shaft to the dynamo, wherein a repulsive torque acts from the vertical shaft against the nacelle assembly due to the load of the dynamo; and characterised by a repulsive torque-balancing mechanism comprising: an upper hollow section attached to the bottom of the nacelle assembly; a casing supporting a horizontal rotary shaft engaged with the vertical shaft, the casing being disposed under the vertical shaft and rotatable around the vertical shaft, wherein a balance torque acts between the casing and the vertical shaft due to the load of the dynamo; a transferring unit coupling the nacelle assembly via the upper hollow section with the casing in such a way and in such a direction, that the balance torque between casing and the vertical shaft and the repulsive torque between vertical shaft and nacelle assembly are balanced; a lower support for rotatably supporting the casing and for supporting a rotating shaft of the dynamo being not rotatable around the vertical shaft. an upper hollow section attached to the bottom of the nacelle assembly; a casing supporting a horizontal rotary shaft engaged with the vertical shaft, the casing being disposed under the vertical shaft and rotatable around the vertical shaft, wherein a balance torque acts between the casing and the vertical shaft due to the load of the dynamo; a transferring unit coupling the nacelle assembly via the upper hollow section with the casing in such a way and in such a direction, that the balance torque between casing and the vertical shaft and the repulsive torque between vertical shaft and nacelle assembly are balanced; a lower support for rotatably supporting the casing and for supporting a rotating shaft of the dynamo being not rotatable around the vertical shaft.