To provide a decorative panel finished in a factory having high design properties and capable of coping even with execution at a site.

In a decorative panel, a base material 1a comprising lightweight aerated concrete has flat surface and the inclined surface crossing the same and a waterproof simple coating film layer 3 is performed on the inclined surface and a waterproof decorative coating film layer 2 is performed from the flat surface to the midway part of the inclined surface from the flat surface. By this constitution, the modulation due to contrast is applied and the design value as the panel is markedly enhanced and the deep quality feeling of the decorative coating layer can be expressed and field repairing become easy and a feeling of physical disorder from a design aspect can not generated in a reparing mark.