A flexible wiring board including a pair of end regions provided in portions of a flexible wiring board on which a plurality of wires are arranged in parallel in one direction and disposed separately in a wiring lengthwise direction, a wiring region configured in another portion of the wiring board and sandwiched between the end regions, a plurality of flexible wiring fins which is divided by at least one slit that connects the end regions in the wiring region, and a flexible wiring bundle by bundling at least part of the plurality of flexible wiring fins.