PURPOSE: To perform an easy construction without depending on a skilled worker.

CONSTITUTION: A panel 3 having a plurality of hooks 31 is fixed to an outer wall 2, and an adhesive 4 is interposed between the reverse surface of a stone tile 1 and the panel 3. A balance 12 is released, a linear groove 11 formed on the reverse surface is engaged with the hook 31, and the stone tile is pressed onto the panel 3. Thus, only by engaging the linear groove to the hook, the stone tile is automatically positioned on the panel, so that efficient and beautiful construction can be performed without depending on a skilled worker.