PURPOSE: To provide a radiowave absorbing material which is thin and has a flat absorbing characteristic over a wide frequency range by constituting with an absorbing material layer including at least two types of magnetic material or dielectric with different radiowave absorbing characteristic and enabling a composition ratio of the absorbing material layer to change in approximately slanted shaped continuously.

CONSTITUTION: A radiowave absorbing material is composed of an absorbing material layer 1 including a magnetic material of Cu-Zn ferrite 2 and a dielectric of a titanium acid lead 3 with different radiowave absorbing characteristics. Then, a composition ratio of the Cu-Zn ferrite 2 and the titanium acid lead 3 of the absorbing material layer 1 is changed in a slanted manner continuously.