PURPOSE: To form a sanitary equipment room which provides the excellent waterproofness and improves the inside appearance.

CONSTITUTION: A tiled wall panel is formed by attaching a number of tiles on the surface of a tile panel, keeping a proper interval, and the part between the tiles is charged with the joint material. On a base body 2, eight pieces of wall panels 31-38 are erected, and a ceiling panel is installed on the wall panels, and each part between the base body 2 and the wall panels 31-38, between the wall panels 31-38, and between the wall panels 31-38 and the ceiling panel is charged with a silicone sealing material 4 which has the nearly same luster and color to those of the joint material charged between the tiles of the wall panel.