PURPOSE: To reduce gaps, make then inconspicuous and keep the appearance by a method wherein a deformable fixing materials are installed at the end sections of each wall surface, decorative sheets are engaged with the fixing materials, and the decorative sheets are abutted and fixed mutually at about the centers of connecting sections.

CONSTITUTION: This decorative structure is formed of each bilateral-shaped fixing material 11 and each bilateral-shaped decorative sheet 12 fitted to the fixing materials 11 at the end sections of the connecting sections of wall surfaces. Engaging sections 11a are formed near the centers of the fixing materials 11. Fitting sections 12a fitted to the engaging members 11a of the fixing materials 11 together with sealing materials and side walls 12b and side walls 12c bent in a chevron shape are formed on the rear sides of the decorative sheets 12, respectively. The decorative sheets 12 on both sides are pushed by approximately equal force, thus fixing the engaging sections 11a of the fixing materials 11 at approximately arranged places without deformation. Accordingly, the decorative sheets 12 are fastened while following the deformation of the fixing materials 11, thus reducing stepped sections and gaps among the wall surfaces and the decorative sheets.