Dampers are interposed between plural surfaces of an information storage device and facing surfaces of an electronic device to reduce shocks and vibrations applied to the information storage device mounted inside the electronic device. Each of the dampers includes portions contacting the electronic device, and portions contacting the information storage device, wherein the two portions are set apart on a plane from each other. Each of the dampers includes a flat platelike body part having a first surface facing the electronic device and a second surface facing the information storage device, a plurality of protrusions protruding from predetermined positions of the first surface of the body part and contacting the electronic device, and a plurality of second protrusions protruding from the second surface of the body part and contacting the information storage device, the plurality of second protrusions being set apart on a plane from the plurality of first protrusions.