To facilitate production while making satisfactory the appearance of a surface by preventing a mark with fixing from appearing on the other surface of a sheet-shaped object such as a toilet lid cover, and preventing the toilet lid cover or the like from being creased by the tensile force of a tension wire.

Parts 14a to be attached at the front ends of a pair of rubber straps 14 for mounting are fixed forward rather than a rear end part 10c of rear side of a toilet lid cover 1O by hot-melt adhesives 16. Hook parts 18 capable of being freely attachably and detachably mounted at the rear end part of the toilet lid are provided at the rear end parts of rubber straps 14 for mounting. The hot-melt adhesives 16 are solidified over the portion of confronting the parts 14a to be attached of the rubber straps 14 for mounting and the rear surface of the toilet lid cover 10 and mainly the fore part and both side parts of the periphery on the rear surface of the toilet lid cover 10. The portion in counter with the rear surface of the toilet lid cover 10 at the parts 14a to be attached of the rubber straps 14 for mounting is fixed by the hot-melt adhesives 16.