PURPOSE:To prevent entering of water from the outside of a pipe line or a leak of a fluid into the pipe line, by a method wherein an inside tube is arranged on the inside of an SMC cylindrical composite, the outside of which is covered with cloth to which water-repellent processing is applied and a strong lining material is formed of the SMC even if a little water is in the pipe line. CONSTITUTION:An SMC cylindrical composite 3 arranged on the outside of a heat-resistant inside tube is obtained by impregnating a high-strength fiber with a curing resin solution having thickening properties. Since the surface of the cylindrical composite 3 is covered with cloth 4 and the cloth 4 is allowed to permeate through styrene steam to be generated at the time of curing of the SMC, it does not happen that the lining material 1 is softened by leaving the styrene within the SMC. The SMC cylindrical composite 3 consisting mainly of the lining material 1 is cured sufficiently and the lining material having high strength is obtained. Then since water-repellent processing is applied to the cloth 4, water does not obstruct curing reaction and cured sufficiently. Since water is prevented from entering into the cloth 4 from the outside even after cure, even if the cylindrical composite 3 is not dense sufficiently, outside water is not leaked out into the pipe line.