Windmill for horizontal axis wind power generator

The present invention enables the implementation of a highly efficient blade shape, such as a blade shape in which the blade width gradually enlarges towards the tip thereof, which could not have been conventionally implemented due to reasons related to strength because blades were supported only on one end in a windmill for a propeller-type horizontal axis wind power generator. The entire windmill is configured as a spoke wheel by connecting the tips of a plurality of blades (4) attached to a hub (5) at an equiangular interval towards the radial direction by means of a circular circumscribed rigid ring (6). As a result each blade (4) is supported at both ends, the base being supported by the hub (5) and the tips of the blades (4) being stably supported by the circumscribed rigid ring (6). Thus, it is possible to remove the restriction on the blade shape which is unique to a support method in which only one end of the blade is supported and in which the tip of the blade needs to be light.