A wind power generator, which minimizes vortexes formed on a disc, thus efficiently rotating the disc, and which has blade type cells capable of increasing wind power, and which reduces friction load of a rotating shaft induced by the weight of the rotating shaft having blades, thus more efficiently rotating the rotating shaft, and which provides protection against a length of the rotating shaft varying according to weather conditions. The wind power generator includes a rotating shaft supported by upper and lower bearing units, a disc mounted on the rotating shaft and first, second and third wind collectors provided on upper and lower surfaces of the disc, with respective holes formed through the disc. The upper bearing unit includes an adjusting bolt having a first ball, a first bearing supporting the first ball and an adjusting nut. The lower bearing unit includes a second bearing and a second ball supported by the second bearing.