To obtain an environmental protection material composed of a specific photocatalytic composite material.

The specific photocatalytic composite material is a composite material comprising a compound composed of one or more of optically active Ax(BOy)zX (A is one or more metal atoms of Ca, Co, Ni, Cu, Al, La, Cr, Fe and Mg; B is one or more atoms of B, P and S; X is one or more of OH, a halogen atom and CO3) and/or a photocatalyst represented by titanium dioxide to which the compound composed of one or more of the optically active Ax(BOy)zX is partially adhered. The photocatalytic composite material for building materials is a building material obtained by directly coating with the photocatalytic composite material or mixing the photocatalytic composite material with a carrier followed by coating with the mixture.