PURPOSE: To build up a structure in which fixing fitments are not exposed on the outer surface by projecting a peripheral section out of an end surface of a core plate and forming a groove section between stones stuck on both surfaces of the core plate.

CONSTITUTION: A stone composite panel 1 is composed of stones 3 stuck on both surfaces of a core plate 2 of hollow structure, and a peripheral edge of the stone 3 is projected out of an end surface of the core plate 2, and groove sections 4 are formed between the strones 3 stuck on both surfaces of the core plate 2. Therefore, in the case a stone composite panel 1 is used for building up partitions, fixing fitments 5 and 6 for a ceiling surface B and a floor surface A can be respectively inserted into the groove sections 4 of an upper end surface and a lower end surface out of the surrounding grooves 4, and also an H-shaped connecting fitment 8 can be inserted into the groove sections 4 on the side surface where two stone composite panels 1 are butted. Fixing fitments 5, 6 and 7 and the connecting fitment 8 are not exposed on the outer surface by said arrangement.