The lining structure of the present invention comprises lining plates (1) each having supporting portions (13) formed at two opposite sides of a square lining plate body (11) via bent step portions (12), and covering portions (15) formed at the remaining sides of the lining plate body (11), and the lining plates (1) are arranged in longitudinal and transverse directions on a surface to be lined, and, in first and second lining plates that are adjacent to each other in longitudinal and transverse directions, a covering portion (15) of one of the lining plates (1) is superposed on a supporting portion of, and being butted against the lining plate body of, another of the lining plates, with the butted portion being joined by welding, with an adhesive, or a combination thereof.