To provide a building member capable of taking not so much of labor for member interchange in the case of getting tired of an architectural design or in the case of making a reform.

In the member formed of at least a resin basic material (8) and a metal basic material (6), it is so characterized that both resin basic material (8) and metal basic material (6) are fitted to each other to unify, the metal basic material (6) consists of an aluminum metal or a magnesium metal or/and these mixtures consisting of an extrusion molding, a cutting stroke, a die casting molding, an injection molding or these combined working, the resin basic material (8) consists of a thermoplastic resin itself or a mixture of the thermoplastic resin and charcoal and that a thermoplastic resin facing sheet (5) is laminated on the resin basic material (8).