Abstract: For reduction in occupation space without sacrifice of the responsible broad bandwidth, an electromagnetic wave absorber for electromagnetic waves is provided with an absorbing sheet formed of a non-woven fabric containing conductive fibers mixed with insulative fibers, and each of the conductive fibers is selected from the group consisting of a metal fiber or a resin fiber coated with a conductive material.

Abstract: An electro-magnetic wave absorbing member comprises a mixture of short fibers of metal or alloy having a high electroconductivity, a length of from 0.1 mm to 50 mm and a length to diameter ratio of larger than 10, ferrite and a high molecular weight synthetic resin. In a modification a sheet of this material is used as a low input impedance layer and laminated with an electroconductive sheet and an impedance conversion layer. The member of this invention can increase electrical loss contributing to the absorption of electric magnetic wave, can stably control the absorption and can be used in many applications.