Abstract: The present invention relates to a bonded matter prepared by bonding a first member to a second member with a laminated sheet, wherein a contractile film constituting the above laminated sheet contracts when the bonded matter is heated, and a part of the laminated sheet is peeled off or the laminated sheet is peeled off from the member, whereby the bonded matter is prevented from being deformed; a roof structure; a laminated sheet used for the above bonded matter, wherein at least a contractile film and a peelable layer are laminated in this order, and the peelable layer is bonded to one of the above members; and when the bonded matter is heated, the peelable layer is peeled off from the above member; and a use method of a laminated sheet characterized by sticking a peelable layer surface of the laminated sheet on one surface side of one member, adhering a contractile film surface of the laminated sheet to the other member with an adhesive and bonding one member to the other member.