Cushion paper

A cushion member comprising a non-woven fabric formed by binding or entangling metal fibers having an average diameter of 8 μm to 18.5 μm, wherein

• when the cushion member is compressed, the cushion member undergoes compressive deformation and the following compressive deformation ratio is 5% to 80%:
• compressive deformation ratio=(T0−T1)/T0×100,
• T0:
• film thickness of cushion member before application of load, and
• T1:
• film thickness of cushion member after application and release of load,
• wherein the film thickness of the cushion member before application and release of load is measured by moving a probe of a digital indicator so that only a weight of the probe itself is applied to a test piece of the cushion member,
• the film thickness of the cushion member after application and release of load is measured after three-times compression at 1 kN load, a compression rate of 1 mm/min, and a gradual increase of a compression stress from 0 MPa to 1 MPa, thereby obtaining a stress-strain chart from which an actual strain to stress is calculated and an amount of compressive deformation is calculated in accordance with the following expression:
• amount of compressive deformation=(strain at the first time rising portion)−(strain at the second rising portion).