A forming method for a laminated body comprising: a lamination step of laminating reinforced fiber base materials on a forming surface of a forming jig to form a laminated body; an attachment step of attaching a pulling jig for applying tension, to an end portion of the laminated body; a deformation step of forming a curved portion (5b, 5d) in the laminated body by bending the laminated body along a curved surface (21b, 21d) formed on the forming surface while pulling the end portion of the laminated body with the pulling jig; and a densification step of densifying the laminated body by heating the curved laminated body while pressurizing the curved laminated body, wherein in the lamination step, the reinforced fiber base materials are laminated such that in the curved portion (5b, 5d) formed in the laminated body, at least a part of a gap between layers of the reinforced fiber base materials is in a non-adhered state in the deformation step, wherein the forming surface includes, as the curved surface, a convex curved surface that is convex to an outside of the forming surface, and a concave curved surface that is concave to an inside of the forming surface; characterized in that in the deformation step, a convex curved portion is formed in the laminated body by bending the laminated body along the convex curved surface while pulling the end portion of the laminated body by the pulling jig, and a concave curved portion is formed in the laminated body by pressing the laminated body against the concave curved surface by using a die material while pulling the end portion of the laminated body by the pulling jig, wherein the die material is fixed to the forming jig so that the convex part of the die material fits into the concave part of the forming jig by the pulling jig. a lamination step of laminating reinforced fiber base materials on a forming surface of a forming jig to form a laminated body; an attachment step of attaching a pulling jig for applying tension, to an end portion of the laminated body; a deformation step of forming a curved portion (5b, 5d) in the laminated body by bending the laminated body along a curved surface (21b, 21d) formed on the forming surface while pulling the end portion of the laminated body with the pulling jig; and a densification step of densifying the laminated body by heating the curved laminated body while pressurizing the curved laminated body, wherein in the lamination step, the reinforced fiber base materials are laminated such that in the curved portion (5b, 5d) formed in the laminated body, at least a part of a gap between layers of the reinforced fiber base materials is in a non-adhered state in the deformation step, wherein the forming surface includes, as the curved surface, a convex curved surface that is convex to an outside of the forming surface, and a concave curved surface that is concave to an inside of the forming surface; characterized in that in the deformation step, a convex curved portion is formed in the laminated body by bending the laminated body along the convex curved surface while pulling the end portion of the laminated body by the pulling jig, and a concave curved portion is formed in the laminated body by pressing the laminated body against the concave curved surface by using a die material while pulling the end portion of the laminated body by the pulling jig, wherein the die material is fixed to the forming jig so that the convex part of the die material fits into the concave part of the forming jig by the pulling jig.