Perforations of a board for building material are formed by a number of
recesses (13), or a number of recesses (13) and through-holes (12). A
bottom face (16) of the recess forms a face for screwing or driving the
fixing element (70) thereto. A color of the bottom face is set to have a
brightness of color decreased in comparison with a color of a surface
(18) of the board. A substrate of the board is a gypsum board and the
bottom face of the recess is formed by a liner paper for gypsum board.
According to such a board, a region for screwing or driving the fixing
element thereto can be ensured without impairing regularity, uniformity
or architectural design of the perforations, and putty finishing or the
like for an exposed part of the fixing element can be omitted.