Method for manufacturing wiring board with a meandering shape section

A method for manufacturing a wiring board, the method comprising steps of:

• applying tensile stress to a substrate so as to extend the substrate with a rate of extension of the substrate being 10% or more, the substrate having a first elastic modulus and the substrate including a first surface, and a second surface positioned on an opposite side of the first surface;
• providing wiring on a first surface side of the substrate which is in an extended state in which the substrate is extended with the rate of extension of the substrate being 10% or more;
• removing the tensile stress from the substrate;
• and
• providing a reinforcing member having a second elastic modulus greater than the first elastic modulus, the reinforcing member at least including a first reinforcing part positioned on the first surface side of the substrate or on a second surface side of the substrate,
• wherein, after removing the tensile stress from the substrate, a section of the wiring that does not overlap the reinforcing member when viewed along the normal direction of the first surface and that has a meandering shape section including pluralities of peaks and valleys aligned along a planar direction of the first surface of the substrate appears, peaks and valleys appear in a section on the first surface side of the substrate overlapping the meandering shape section, and peaks and valleys appear in a section on the second surface side of the substrate overlapping the meandering shape section.