NOVELTY - The apparatus i.e. electric power generating window glass (1), has a transparent substrate (10) formed with a mutually opposing light-incidence surface (S1) and a light-projection surface (S2). A light-control layer i.e. light-control film (12), is provided in one side of the light-incidence surface, where scattering characteristics of the light-control layer differ according to an incident angle. A photoelectric conversion element i.e. solar cell (11), is arranged in an edge part of the substrate, and receives a part of emitted light from the light-control layer.    USE - Electric power generating apparatus i.e. electric power generating window glass, for use in a side wall of a room, a wall surface and a ceiling as a skylight in an office building and a home.    ADVANTAGE - The scattering characteristics of the light-control layer differ in the light incidence surface side of the substrate according to the incident angle, so that the light can be made to permeate without scattering when generating electric power by inducing a part of light injected to the photoelectric conversion element in the predetermined angle, and the light can be made to radiate from the light projection surface of the substrate so as to produce electric power suppressing permeability reduction relative to the incident light from a specific direction. The apparatus enables large amount of light to be induced to the solar cell, so that the light quantity taken into the solar cell is increased, and installation area of the solar is reduced.    DETAILED DESCRIPTION - The transparent substrate is a glass substrate or plastic substrate such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide, polycarbonate (PC) or cycloolefin polymer (COP) substrates, where the transparent substrate is plate-shaped or wedge-shaped. The solar cell is an organic thin film solar cell, an inorganic solar cell or dye-sensitized solar cell such as silicon hybrid type solar cell, gallium arsenide type solar cell or copper-indium-gallium-selenide solar cell.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of an electric power generating window glass.'(Drawing includes non-English language text)'    Light-incidence surface (S1)    Light-projection surface (S2)    Electric power generating window glass (1)    Transparent substrate (10)    Solar cell (11)    Light-control film (12)