To create new energy by utilizing energy which is conventionally not used by giving solar heat to a vertical portion of a side wall of a house and create a heat flow by using a chimney effect to the heat flow.

A passage 18 made of a round pipe with a black surface color is provided on an exterior wall 17 and a roof 3 of a building or house, and an electric generator 12 having a fan 11 is installed near the upper end in the passage 18. In this case, the passage 18 is assembled together in one united body with a building 1 or house in the design and construction work, or the passage 18 can be sold as an independent body and attached as an adopter to an existing house. Also, on the surface of the passage 18, a fin having a high heat absorption can be provided or the efficiency can be increased by giving a special surface treatment. During electric power generation, the passage 18 is heated by the heat ray 20 from the sun 19, an up-rising air current 21 due to the heating effect can be generated inside the passage 18, and the fan 11 is rotated by the up-rising air current 21 and an electric current is generated. By doing this, by utilizing the wall surface facing the south or a sloped roof, new energy can be created without polluting the environment.