A mounting method for attaching a covering member to an inner wall of a cylindrical tube , the covering member having a first sheet and a laminated sheet assembly , the method comprising: causing the first sheet to memorize a shape of curvature having a predetermined radius of curvature by curing a first resin while holding the first sheet with the predetermined radius of curvature, the first sheet being impregnated with the first resin ; wrapping the first sheet around a radially expandable cylindrical packer and tentatively fastening the first sheet to the packer , wherein the first sheet memorizes the shape of curvature and the packer has a radius that is smaller than the predetermined radius of curvature; forming a laminated sheet assembly by attaching a plurality of sheets to each other with a second resin ; forming the covering member by wrapping the laminated sheet assembly around an outer surface of the first sheet via a third resin and tentatively fastening the laminated sheet assembly , the first sheet being wrapped around the packer ; applying a fourth resin to an outer surface of the laminated sheet assembly of the covering member ; inserting the packer into a cylindrical tube having a radius that is smaller than the predetermined radius of curvature and that is larger than a radius of an outer surface of the fourth resin ; radially expanding the packer in the cylindrical tube to release the tentative fastening of the first sheet and the laminated sheet assembly , thereby pressing the covering member against the inner wall of the cylindrical tube via the fourth resin ; pulling out the packer from the cylindrical tube ; and curing the second, third, and fourth resins to attach the covering member to the inner wall of the cylindrical tube . causing the first sheet to memorize a shape of curvature having a predetermined radius of curvature by curing a first resin while holding the first sheet with the predetermined radius of curvature, the first sheet being impregnated with the first resin ; wrapping the first sheet around a radially expandable cylindrical packer and tentatively fastening the first sheet to the packer , wherein the first sheet memorizes the shape of curvature and the packer has a radius that is smaller than the predetermined radius of curvature; forming a laminated sheet assembly by attaching a plurality of sheets to each other with a second resin ; forming the covering member by wrapping the laminated sheet assembly around an outer surface of the first sheet via a third resin and tentatively fastening the laminated sheet assembly , the first sheet being wrapped around the packer ; applying a fourth resin to an outer surface of the laminated sheet assembly of the covering member ; inserting the packer into a cylindrical tube having a radius that is smaller than the predetermined radius of curvature and that is larger than a radius of an outer surface of the fourth resin ; radially expanding the packer in the cylindrical tube to release the tentative fastening of the first sheet and the laminated sheet assembly , thereby pressing the covering member against the inner wall of the cylindrical tube via the fourth resin ; pulling out the packer from the cylindrical tube ; and curing the second, third, and fourth resins to attach the covering member to the inner wall of the cylindrical tube . <EOS>