Abstract: A projection board provides an acrylic transparent base material with a flat facial side thereof uniformly adhered with a metal grain layer made of aluminum powder to show an image projected from a projector brightly by means of refection of the metal grain layer. Further, another flat facial side of the transparent base material is uniformly adhered with a frosted layer, which has light penetration rate between 40 to 95% and thickness between 1 to 4 micrometers for obtaining much better effect of image display.