To provide an electromagnetic wave shield board together with its construction method which provides a sufficient electromagnetic wave shield effect, with light weight, excellent in construction characteristics and working characteristics while nonflammable.

An electromagnetic wave shield metalized fiber fabric of flame- resistance is pasted on at least one surface of a nonflammable phenol resin form plate comprising phenol resin, inorganic powder, and inorganic fabric, for light weight and excellent construction characteristics, being flame resistant.