To prevent cracking by drying and separation of a waterproof layer and a lightweight cement layer, by reducing a variation in strength in a plate for building.

In this plate 1 for building, a surface side waterproof layer 3 is arranged on a surface of a base board 2 composed of a fiber board, and the lightweight cement layer 5 is also arranged on this surface side waterproof layer via a recess-projection layer 4 or without interposing the recess-projection layer 4, and a reverse surface side waterproof layer 6 is arranged on a base board reverse surface. A medium density fiber board MDF manufactured by a dry process is desirably used as the fiber board.