According to one embodiment, an electronic device includes a flexible printed-wiring board which includes a first face and a second face, and is supported by the support member. One or more electronic components are mounted on the first face. The electronic device is fixed onto the second face. The flexible printed-wiring board includes a plurality of first regions, on which the one or more electronic components are mounted or to which a member secured on the support member is fixed. When viewed from a direction orthogonal to the first face, the plate is provided with an opening between two first regions of the plurality of first regions.