To provide a mesh sheet that is used for a window blind etc., has a lighting property and a heat shield property and in addition, has a visual field control function by a mirror effect.

Flat fabric is provided by assuming: coarse mesh fabrics as a base material; a flat mesh sheet as a substrate, whose entire surface is covered with thermoplastic resin, and has a number of through-holes and whose porosity is 5-30%; by providing a heat ray diffused reflection resin layer that contains a squama particle on a single surface of this flat mesh sheet, and the coarse mesh fabric by confounding a flat warp bundle with three parallel multifilament yarns with a flat weft bundle.