Joint structure and method for manufacturing joint structure

A method for manufacturing a joint structure comprising:

• molding a composite material which includes a plate portion that is formed by laminating a plurality of fiber sheets, and a raised portion that is formed by laminating a plurality of fiber sheets in addition to the plurality of fiber sheets of the plate portion, and in which surfaces of the plate portion and the raised portion are covered with a single fiber sheet;
• molding a reinforcing material to be joined to the raised portion of the composite material;
• and
• forming a joint structure by joining the raised portion of the composite material and the reinforcing material through an adhesive,
• wherein in forming the joint structure, a second boundary between the raised portion and the reinforcing material is set to be located at a different position with respect to a first boundary between the plate portion and the raised portion in an in-plane direction of a laminated interface between the fiber sheets which are laminated,
• wherein the plate portion is a flat plate, and
• wherein, during the molding of the composite material, the raised portion is raised with respect to an inner surface of the plate portion and is provided on an entirety of a surface to be bonded to which a stringer is bonded, so as to reduce a peel stress applied to an adhesive interface between the composite material and the reinforcing material.