In a stretchable wiring member having a relatively hard portion, such as a contact point, there is provided a solution to malfunction of the stretchable wiring member caused by stress generated at a boundary between the hard portion and a flexible portion. A stretchable wiring member includes a flexible substrate having stretchability, a stretchable wiring line disposed along the flexible substrate and configured to be stretched in association with stretching deformation of the flexible substrate, and a hard member that is harder than the flexible substrate. The flexible substrate has an extension layer portion interposed between the hard member and the stretchable wiring line.