According to one embodiment, a bearing assembly method for providing a bearing between a shaft and a rotator, comprises: embedding the bearing between the shaft and the rotator, and supplying a first adhesive between an inner ring of the bearing and the shaft and a second adhesive between an outer ring of the bearing and the rotator; partially pressing a plurality of points on an end surface of the inner ring before the first adhesive and the second adhesive are cured; and finishing pressing when the first adhesive and the second adhesive are cured.