PROBLEM TO BE SOLVED: To provide a light regulating sheet that does not shade the light due to having a high total light transmittance in the morning and evening when solar radiation is low, shades the light due to having a low total light transmittance in the daytime when solar radiation is high, and has a function of suppressing increase of the temperature in a house.SOLUTION: The invention provides a light regulating sheet used for house-covering materials, having a porous layer with a thickness of 17 μm or more on a light transparent support without air permeability, the porous layer having a median pore size of 46 nm or more.SELECTED DRAWING: None【課題】日射の弱い朝夕においては高い全光線透過率を有することで遮光を行わず、日射の強い日中には低い全光線透過率を有し遮光を行い、ハウス内温度の上昇を抑える機能を有する調光シートを提供する。【解決手段】ハウス被覆資材に用いられる調光シートであって、通気性を有さない光透過性支持体の上に厚み１７μｍ以上の多孔質層を有し、該多孔質層のメジアン細孔径が４６ｎｍ以上であることを特徴とする調光シート。【選択図】なし
