To provide a woody cement plate having a strength equivalent to that of a plywood for a structure.

In the woody cement plate comprising a three-layer structure of front and rear layers each made of strands as a woody material and each adding a hydraulic inorganic material, and a core layer containing a particle board layer adhered to a flake with an adhesive. Thus, the front and rear layers improve a tensile strength, and the layers added with the inorganic material improve a fireproofness and durability. The core layer gives a strength equivalent to that of a woody building plate.