To minimize loss of human life, and minor and serious injuries, caused by fall of furniture and a hung object in a house due to collapse and fall of a building upon earthquake disaster.

The gypsum board comprises a gypsum board body 1, and a holed aluminum or steel reinforcing plate, or a no-hole plate 2, which are press-fitted with an adhesive agent 3. A metal piece for prevention of fall of the hung object and furniture can be fitted to the holed aluminum or steel reinforcing board. By using the gypsum board reinforcing joint board as a material for a side face wall, a partition wall face and a ceiling face material upon new construction or refurbishing work, a whole structure of the house or the building is strengthened, fall or collapse of the building or the wooden house is suppressed to a minimum, and fall of furniture or the object hung on the wall or the ceiling surface is prevented.