To provide a light, thin, highly efficient, vertically rotating and intermittently spaced wind mill wind force generating device flexibly dealing with conditions of location for installation places.

The whole of a light and thin wind mill is formed into a thoroughly simple structure. The light, thin, vertically rotating and intermittently spaced wind mill wind force generating device is excellent in rotational efficiency of a wind receiving wind mill being a streamlined intermittently spaced wind mill reducing as much as possible air resistance at a gradient of approximately 60 degrees in a wind mill rotating direction. The device is provided with a double failure preventing safety structure and multifunction dealing with wind and strong wind blown down from every direction, and can flexibly deal with conditions of location for every installation place such as on the roofs of a house and a building for general household private power generation.